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class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/Ordres_de_magnitud_(temps)" title="Ordres de magnitud (temps) – Catalan" lang="ca" hreflang="ca" data-title="Ordres de magnitud (temps)" data-language-autonym="Català" data-language-local-name="Catalan" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/Liste_von_Gr%C3%B6%C3%9Fenordnungen_der_Zeit" title="Liste von Größenordnungen der Zeit – German" lang="de" hreflang="de" data-title="Liste von Größenordnungen der Zeit" data-language-autonym="Deutsch" data-language-local-name="German" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/Ordres_de_grandeur_de_dur%C3%A9e" title="Ordres de grandeur de durée – French" lang="fr" hreflang="fr" data-title="Ordres de grandeur de durée" data-language-autonym="Français" data-language-local-name="French" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%ED%81%AC%EA%B8%B0_%EC%A0%95%EB%8F%84_(%EC%8B%9C%EA%B0%84)" title="크기 정도 (시간) – Korean" lang="ko" hreflang="ko" data-title="크기 정도 (시간)" data-language-autonym="한국어" data-language-local-name="Korean" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-it mw-list-item"><a href="https://it.wikipedia.org/wiki/Ordini_di_grandezza_(tempo)" title="Ordini di grandezza (tempo) – Italian" lang="it" hreflang="it" data-title="Ordini di grandezza (tempo)" data-language-autonym="Italiano" data-language-local-name="Italian" class="interlanguage-link-target"><span>Italiano</span></a></li><li class="interlanguage-link interwiki-ms mw-list-item"><a href="https://ms.wikipedia.org/wiki/Peringkat_magnitud_(masa)" title="Peringkat magnitud (masa) – Malay" lang="ms" hreflang="ms" data-title="Peringkat magnitud (masa)" data-language-autonym="Bahasa Melayu" data-language-local-name="Malay" class="interlanguage-link-target"><span>Bahasa Melayu</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/%E6%99%82%E9%96%93%E3%81%AE%E6%AF%94%E8%BC%83" title="時間の比較 – Japanese" lang="ja" hreflang="ja" data-title="時間の比較" data-language-autonym="日本語" data-language-local-name="Japanese" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/Ordens_de_magnitude_para_tempo" title="Ordens de magnitude para tempo – Portuguese" lang="pt" hreflang="pt" data-title="Ordens de magnitude para tempo" data-language-autonym="Português" data-language-local-name="Portuguese" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-simple mw-list-item"><a href="https://simple.wikipedia.org/wiki/Orders_of_magnitude_(time)" title="Orders of magnitude (time) – Simple English" lang="en-simple" hreflang="en-simple" data-title="Orders of magnitude (time)" data-language-autonym="Simple English" data-language-local-name="Simple English" class="interlanguage-link-target"><span>Simple English</span></a></li><li class="interlanguage-link interwiki-th mw-list-item"><a href="https://th.wikipedia.org/wiki/%E0%B8%AD%E0%B8%B1%E0%B8%99%E0%B8%94%E0%B8%B1%E0%B8%9A%E0%B8%82%E0%B8%AD%E0%B8%87%E0%B8%82%E0%B8%99%E0%B8%B2%E0%B8%94_(%E0%B9%80%E0%B8%A7%E0%B8%A5%E0%B8%B2)" title="อันดับของขนาด (เวลา) – Thai" lang="th" hreflang="th" data-title="อันดับของขนาด (เวลา)" data-language-autonym="ไทย" data-language-local-name="Thai" class="interlanguage-link-target"><span>ไทย</span></a></li><li class="interlanguage-link interwiki-uk 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data-mw-ve-target-container> <div class="vector-body-before-content"> <div class="mw-indicators"> </div> <div id="siteSub" class="noprint">From Wikipedia, the free encyclopedia</div> </div> <div id="contentSub"><div id="mw-content-subtitle"><span class="mw-redirectedfrom">(Redirected from <a href="/w/index.php?title=Yoctosecond&redirect=no" class="mw-redirect" title="Yoctosecond">Yoctosecond</a>)</span></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="en" dir="ltr"><div class="shortdescription nomobile noexcerpt noprint searchaux" style="display:none">Comparison of a wide range of timescales</div> <p class="mw-empty-elt"> </p> <style data-mw-deduplicate="TemplateStyles:r1251242444">.mw-parser-output .ambox{border:1px solid #a2a9b1;border-left:10px solid #36c;background-color:#fbfbfb;box-sizing:border-box}.mw-parser-output .ambox+link+.ambox,.mw-parser-output .ambox+link+style+.ambox,.mw-parser-output .ambox+link+link+.ambox,.mw-parser-output .ambox+.mw-empty-elt+link+.ambox,.mw-parser-output .ambox+.mw-empty-elt+link+style+.ambox,.mw-parser-output .ambox+.mw-empty-elt+link+link+.ambox{margin-top:-1px}html body.mediawiki .mw-parser-output .ambox.mbox-small-left{margin:4px 1em 4px 0;overflow:hidden;width:238px;border-collapse:collapse;font-size:88%;line-height:1.25em}.mw-parser-output .ambox-speedy{border-left:10px solid #b32424;background-color:#fee7e6}.mw-parser-output .ambox-delete{border-left:10px solid #b32424}.mw-parser-output .ambox-content{border-left:10px solid #f28500}.mw-parser-output .ambox-style{border-left:10px solid #fc3}.mw-parser-output .ambox-move{border-left:10px solid #9932cc}.mw-parser-output .ambox-protection{border-left:10px solid #a2a9b1}.mw-parser-output .ambox .mbox-text{border:none;padding:0.25em 0.5em;width:100%}.mw-parser-output .ambox .mbox-image{border:none;padding:2px 0 2px 0.5em;text-align:center}.mw-parser-output .ambox .mbox-imageright{border:none;padding:2px 0.5em 2px 0;text-align:center}.mw-parser-output .ambox .mbox-empty-cell{border:none;padding:0;width:1px}.mw-parser-output .ambox .mbox-image-div{width:52px}@media(min-width:720px){.mw-parser-output .ambox{margin:0 10%}}@media print{body.ns-0 .mw-parser-output .ambox{display:none!important}}</style><table class="box-More_citations_needed plainlinks metadata ambox ambox-content ambox-Refimprove" role="presentation"><tbody><tr><td class="mbox-image"><div class="mbox-image-div"><span typeof="mw:File"><a href="/wiki/File:Question_book-new.svg" class="mw-file-description"><img alt="" src="//upload.wikimedia.org/wikipedia/en/thumb/9/99/Question_book-new.svg/50px-Question_book-new.svg.png" decoding="async" width="50" height="39" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/9/99/Question_book-new.svg/75px-Question_book-new.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/9/99/Question_book-new.svg/100px-Question_book-new.svg.png 2x" data-file-width="512" data-file-height="399" /></a></span></div></td><td class="mbox-text"><div class="mbox-text-span">This article <b>needs additional citations for <a href="/wiki/Wikipedia:Verifiability" title="Wikipedia:Verifiability">verification</a></b>.<span class="hide-when-compact"> Please help <a href="/wiki/Special:EditPage/Orders_of_magnitude_(time)" title="Special:EditPage/Orders of magnitude (time)">improve this article</a> by <a href="/wiki/Help:Referencing_for_beginners" title="Help:Referencing for beginners">adding citations to reliable sources</a>. Unsourced material may be challenged and removed.<br /><small><span class="plainlinks"><i>Find sources:</i> <a rel="nofollow" class="external text" href="https://www.google.com/search?as_eq=wikipedia&q=%22Orders+of+magnitude%22+time">"Orders of magnitude" time</a> – <a rel="nofollow" class="external text" href="https://www.google.com/search?tbm=nws&q=%22Orders+of+magnitude%22+time+-wikipedia&tbs=ar:1">news</a> <b>·</b> <a rel="nofollow" class="external text" href="https://www.google.com/search?&q=%22Orders+of+magnitude%22+time&tbs=bkt:s&tbm=bks">newspapers</a> <b>·</b> <a rel="nofollow" class="external text" href="https://www.google.com/search?tbs=bks:1&q=%22Orders+of+magnitude%22+time+-wikipedia">books</a> <b>·</b> <a rel="nofollow" class="external text" href="https://scholar.google.com/scholar?q=%22Orders+of+magnitude%22+time">scholar</a> <b>·</b> <a rel="nofollow" class="external text" href="https://www.jstor.org/action/doBasicSearch?Query=%22Orders+of+magnitude%22+time&acc=on&wc=on">JSTOR</a></span></small></span> <span class="date-container"><i>(<span class="date">January 2020</span>)</i></span><span class="hide-when-compact"><i> (<small><a href="/wiki/Help:Maintenance_template_removal" title="Help:Maintenance template removal">Learn how and when to remove this message</a></small>)</i></span></div></td></tr></tbody></table> <p>An <a href="/wiki/Order_of_magnitude" title="Order of magnitude">order of magnitude</a> of time is usually a <a href="/wiki/Decimal" title="Decimal">decimal</a> prefix or decimal order-of-magnitude quantity together with a base unit of time, like a <a href="/wiki/Microsecond" title="Microsecond">microsecond</a> or a <a href="/wiki/Million_years" class="mw-redirect" title="Million years">million years</a>. In some cases, the order of magnitude may be implied (usually 1), like a "second" or "year". In other cases, the quantity name implies the <a href="/wiki/Base_unit_(measurement)" class="mw-redirect" title="Base unit (measurement)">base unit</a>, like "century". In most cases, the base unit is seconds or years. </p><p>Prefixes are not usually used with a base unit of years. Therefore, it is said "a million years" instead of "a megayear". Clock time and calendar time have <a href="/wiki/Duodecimal" title="Duodecimal">duodecimal</a> or <a href="/wiki/Sexagesimal" title="Sexagesimal">sexagesimal</a> orders of magnitude rather than decimal, e.g., a year is 12 months, and a minute is 60 seconds. </p><p>The smallest meaningful increment of time is the <a href="/wiki/Planck_time" class="mw-redirect" title="Planck time">Planck time</a>―the time light takes to traverse the <a href="/wiki/Planck_distance" class="mw-redirect" title="Planck distance">Planck distance</a>, many decimal orders of magnitude smaller than a second.<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> </p><p>The largest realized amount of time, based on known scientific data, is the <a href="/wiki/Age_of_the_universe" title="Age of the universe">age of the universe</a>, about 13.8 billion years—the time since the <a href="/wiki/Big_Bang" title="Big Bang">Big Bang</a> as measured in the <a href="/wiki/Cosmic_microwave_background" title="Cosmic microwave background">cosmic microwave background</a> <a href="/wiki/Rest_frame" title="Rest frame">rest frame</a>.<sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> Those amounts of time together span 60 decimal orders of magnitude. Metric prefixes are defined spanning 10<sup>−30</sup> to 10<sup><span class="nowrap"><span data-sort-value="7001300000000000000♠"></span>30</span></sup>, 60 decimal orders of magnitude which may be used in conjunction with the metric base unit of second. </p><p>Metric units of time larger than the second are most commonly seen only in a few scientific contexts such as observational astronomy and materials science, although this depends on the author. For everyday use and most other scientific contexts, the common units of minutes, hours (3,600 s or 3.6 ks), days (86,400 s), weeks, months, and years (of which there are a number of variations) are commonly used. Weeks, months, and years are significantly variable units whose lengths depend on the choice of calendar and are often not regular even with a calendar, e.g., leap years versus regular years in the <a href="/wiki/Gregorian_calendar" title="Gregorian calendar">Gregorian calendar</a>. This makes them problematic for use against a linear and regular time scale such as that defined by the <a href="/wiki/SI" class="mw-redirect" title="SI">SI</a>, since it is not clear which version is being used. </p><p>Because of this, the table below does not include weeks, months, and years. Instead, the table uses the <a href="/wiki/Annum" class="mw-redirect" title="Annum">annum</a> or <a href="/wiki/Julian_year_(astronomy)" title="Julian year (astronomy)">astronomical Julian year</a> (365.25 days of 86,400 seconds), denoted with the symbol a. Its definition is based on the average length of a year according to the <a href="/wiki/Julian_calendar" title="Julian calendar">Julian calendar</a>, which has one <a href="/wiki/Leap_year" title="Leap year">leap year</a> every four years. According to the geological science convention, this is used to form larger units of time by the application of <a href="/wiki/SI_prefix" class="mw-redirect" title="SI prefix">SI prefixes</a> to it; at least up to giga-annum or Ga, equal to 1,000,000,000 a (short scale: one billion years, long scale: one milliard years). </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Less_than_one_second">Less than one second</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Orders_of_magnitude_(time)&action=edit&section=1" title="Edit section: Less than one second"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <table class="wikitable plainrowheaders"> <caption>Units of measure less than a second </caption> <tbody><tr> <th scope="col">Multiple<br />of a<br />second </th> <th scope="col">Unit </th> <th scope="col">Symbol </th> <th scope="col">Definition </th> <th scope="col">Comparative examples & common units </th></tr> <tr> <td>10<sup><span class="nowrap"><span data-sort-value="2998560000000000000♠"></span>−44</span></sup> </td> <th scope="row"><a href="/wiki/Planck_time" class="mw-redirect" title="Planck time">Planck time</a> </th> <td style="text-align: center"><i>t</i><sub>P</sub> </td> <td>Presumed to be the shortest theoretically measurable time interval<br />(but not necessarily the shortest <i>increment</i> of time—see <a href="/wiki/Quantum_gravity" title="Quantum gravity">quantum gravity</a>) </td> <td><b><span class="nowrap"><span data-sort-value="6956100000000000000♠"></span>10<sup>−14</sup> qs</span></b>: The length of one <a href="/wiki/Planck_time" class="mw-redirect" title="Planck time">Planck time</a> (<i>t</i><sub>P</sub> = <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle {\sqrt {\hbar G/c^{5}}}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mrow class="MJX-TeXAtom-ORD"> <msqrt> <mi class="MJX-variant">ℏ</mi> <mi>G</mi> <mrow class="MJX-TeXAtom-ORD"> <mo>/</mo> </mrow> <msup> <mi>c</mi> <mrow class="MJX-TeXAtom-ORD"> <mn>5</mn> </mrow> </msup> </msqrt> </mrow> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle {\sqrt {\hbar G/c^{5}}}}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/f695727ded3b7838c58892e44305bf67e83fa413" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -1.671ex; width:8.68ex; height:4.843ex;" alt="{\displaystyle {\sqrt {\hbar G/c^{5}}}}"></span> ≈ <span class="nowrap"><span data-sort-value="6956538999999999999♠"></span>5.39<span style="margin-left:0.25em;margin-right:0.15em;">×</span>10<sup>−44</sup> s</span>)<sup id="cite_ref-3" class="reference"><a href="#cite_note-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> is the briefest physically meaningful span of time. It is the unit of time in the <a href="/wiki/Natural_units" title="Natural units">natural units</a> system known as <a href="/wiki/Planck_units" title="Planck units">Planck units</a>. </td></tr> <tr> <td>10<sup>−30</sup> </td> <th scope="row">quectosecond<span class="anchor" id="Quectosecond"></span> </th> <td style="text-align: center">qs </td> <td><b>Quectosecond</b>, (<i><a href="/wiki/Quecto-" class="mw-redirect" title="Quecto-">quecto-</a></i> + <i>second</i>), is one <a href="/wiki/Names_of_large_numbers" title="Names of large numbers">nonillionth</a> of a second </td> <td> </td></tr> <tr> <td>10<sup>−27</sup> </td> <th scope="row">rontosecond<span class="anchor" id="Rontosecond"></span> </th> <td style="text-align: center">rs </td> <td><b>Rontosecond</b>, (<i><a href="/wiki/Ronto-" class="mw-redirect" title="Ronto-">ronto-</a></i> + <i>second</i>), is one <a href="/wiki/Names_of_large_numbers" title="Names of large numbers">octillionth</a> of a second </td> <td><b>300 rs</b>: The <a href="/wiki/Mean_lifetime" class="mw-redirect" title="Mean lifetime">mean lifetime</a> of <a href="/wiki/W_and_Z_bosons" title="W and Z bosons">W and Z bosons</a> </td></tr> <tr> <td>10<sup>−24</sup> </td> <th scope="row">yoctosecond<span class="anchor" id="Yoctosecond"></span> </th> <td style="text-align: center">ys<sup id="cite_ref-4" class="reference"><a href="#cite_note-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> </td> <td><b>Yoctosecond</b>, (<i><a href="/wiki/Yocto-" class="mw-redirect" title="Yocto-">yocto-</a></i> + <i>second</i>), is one <a href="/wiki/Names_of_large_numbers" title="Names of large numbers">septillionth</a> of a second </td> <td><b>23 ys</b>: The lower estimated bound on the <a href="/wiki/Half-life" title="Half-life">half-life</a> of <a href="/wiki/Isotopes_of_hydrogen#Hydrogen-7" title="Isotopes of hydrogen">isotope 7 of hydrogen (Hydrogen-7)</a><br /><b>143 ys</b>: The <a href="/wiki/Half-life" title="Half-life">half-life</a> of the <a href="/wiki/Isotopes_of_nitrogen" title="Isotopes of nitrogen">Nitrogen-10</a> isotope of Nitrogen<br /><b>156 ys</b>: The mean lifetime of a <a href="/wiki/Higgs_Boson" class="mw-redirect" title="Higgs Boson">Higgs Boson</a> </td></tr> <tr> <td>10<sup>−21</sup> </td> <th scope="row">zeptosecond<span class="anchor" id="Zeptosecond"></span> </th> <td style="text-align: center">zs </td> <td><b>Zeptosecond</b>, (<i><a href="/wiki/Zepto-" class="mw-redirect" title="Zepto-">zepto-</a></i> + <i>second</i>), is one <a href="/wiki/Names_of_large_numbers" title="Names of large numbers">sextillionth</a> of one second </td> <td><b>1.3 zs</b>: Smallest experimentally controlled time delay in a photon field.<sup id="cite_ref-5" class="reference"><a href="#cite_note-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup><br /> <b>2 zs</b>: The representative cycle time of <a href="/wiki/Gamma_ray" title="Gamma ray">gamma ray</a> radiation released in the decay of a radioactive <a href="/wiki/Atomic_nucleus" title="Atomic nucleus">atomic nucleus</a> (here as 2 <a href="/wiki/Electronvolt" title="Electronvolt">MeV</a> per emitted <a href="/wiki/Photon" title="Photon">photon</a>)<br /><b>4 zs</b>: The cycle time of the <a href="/wiki/Zitterbewegung" title="Zitterbewegung">zitterbewegung</a> of an <a href="/wiki/Electron" title="Electron">electron</a> (<span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle \omega =2m_{e}c^{2}/\hbar }"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>ω</mi> <mo>=</mo> <mn>2</mn> <msub> <mi>m</mi> <mrow class="MJX-TeXAtom-ORD"> <mi>e</mi> </mrow> </msub> <msup> <mi>c</mi> <mrow class="MJX-TeXAtom-ORD"> <mn>2</mn> </mrow> </msup> <mrow class="MJX-TeXAtom-ORD"> <mo>/</mo> </mrow> <mi class="MJX-variant">ℏ</mi> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle \omega =2m_{e}c^{2}/\hbar }</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/9c50ec1a966d5043b628b5ec0968fb1601cee341" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.838ex; width:13.276ex; height:3.176ex;" alt="{\displaystyle \omega =2m_{e}c^{2}/\hbar }"></span>) <br /><b>247 zs</b>: The experimentally-measured travel time of a photon across a hydrogen molecule, "for the average bond length of molecular hydrogen"<sup id="cite_ref-6" class="reference"><a href="#cite_note-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup> </td></tr> <tr> <td>10<sup>−18</sup> </td> <th scope="row"><a href="/wiki/Attosecond" title="Attosecond">attosecond</a> </th> <td style="text-align: center">as </td> <td>One quintillionth of one second </td> <td><b>12 as</b>: The best timing control of laser pulses.<sup id="cite_ref-7" class="reference"><a href="#cite_note-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup><br /><b>43 as</b>: The shortest X-ray laser pulse<sup id="cite_ref-8" class="reference"><a href="#cite_note-8"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup><br /><b>53 as</b>: The shortest electron laser pulse<sup id="cite_ref-9" class="reference"><a href="#cite_note-9"><span class="cite-bracket">[</span>9<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-10" class="reference"><a href="#cite_note-10"><span class="cite-bracket">[</span>10<span class="cite-bracket">]</span></a></sup> </td></tr> <tr> <td>10<sup>−15</sup> </td> <th scope="row"><a href="/wiki/Femtosecond" title="Femtosecond">femtosecond</a> </th> <td style="text-align: center">fs </td> <td>One quadrillionth of one second </td> <td><b>1 fs</b>: The cycle time for ultraviolet light with a wavelength of 300 <a href="/wiki/Nanometre" title="Nanometre">nanometres</a>; The time it takes light to travel a distance of 0.3 micrometres (μm).<br /><b>7.58fs</b>: The period of vibration of a hydrogen molecule.<br /><b>140 fs</b>: The time needed for electrons to have localized onto individual <a href="/wiki/Bromine" title="Bromine">bromine</a> atoms 6 <a href="/wiki/Angstrom" title="Angstrom">Ångstrom</a> apart after <a href="/wiki/Femtochemistry" title="Femtochemistry">laser dissociation</a> of Br<sub>2</sub>.<sup id="cite_ref-li-visualizing_11-0" class="reference"><a href="#cite_note-li-visualizing-11"><span class="cite-bracket">[</span>11<span class="cite-bracket">]</span></a></sup><br /><b>290 fs</b>: The lifetime of a <a href="/wiki/Tauon" class="mw-redirect" title="Tauon">tauon</a> </td></tr> <tr> <td>10<sup>−12</sup> </td> <th scope="row"><a href="/wiki/Picosecond" title="Picosecond">picosecond</a> </th> <td style="text-align: center">ps </td> <td>One trillionth of one second </td> <td><b>1 ps</b>: The mean lifetime of a <a href="/wiki/Bottom_quark" title="Bottom quark">bottom quark</a>; the time needed for light to travel 0.3 millimetres (mm)<br /><b>1 ps</b>: The typical lifetime of a <a href="/wiki/Transition_state_theory" title="Transition state theory">transition state</a> one machine cycle by an IBM <a href="/wiki/Silicon-germanium#SiGe_transistors" class="mw-redirect" title="Silicon-germanium">silicon-germanium transistor</a><br /><b>109 ps</b>: The period of the <a href="/wiki/Photon_energy" title="Photon energy">photon corresponding to</a> the <a href="/wiki/Hyperfine_structure" title="Hyperfine structure">hyperfine transition</a> of the ground state of <a href="/wiki/Cesium-133" class="mw-redirect" title="Cesium-133">cesium-133</a>, and one 9,192,631,770th of one second <a href="/wiki/Caesium_standard" title="Caesium standard">by definition</a><br /><b>114.6 ps</b>: The time for the fastest overclocked processor as of 2014<sup class="plainlinks noexcerpt noprint asof-tag update" style="display:none;"><a class="external text" href="https://en.wikipedia.org/w/index.php?title=Orders_of_magnitude_(time)&action=edit">[update]</a></sup> to execute one machine cycle.<sup id="cite_ref-12" class="reference"><a href="#cite_note-12"><span class="cite-bracket">[</span>12<span class="cite-bracket">]</span></a></sup><br /><b>696 ps</b>: How much more a second lasts far away from Earth's gravity due to the effects of <a href="/wiki/General_Relativity" class="mw-redirect" title="General Relativity">General Relativity</a> </td></tr> <tr> <td>10<sup>−9</sup> </td> <th scope="row"><a href="/wiki/Nanosecond" title="Nanosecond">nanosecond</a> </th> <td style="text-align: center">ns </td> <td>One billionth of one second </td> <td><b>1 ns</b>: The time needed to execute one machine cycle by a 1 GHz microprocessor<br /><b>1 ns</b>: The time light takes to travel 30 cm (11.811 in) </td></tr> <tr> <td>10<sup>−6</sup> </td> <th scope="row"><a href="/wiki/Microsecond" title="Microsecond">microsecond</a> </th> <td style="text-align: center">μs </td> <td>One millionth of one second </td> <td><b>1 μs</b>: The time needed to execute one machine cycle by an Intel 80186 microprocessor<br /><b>2.2 μs</b>: The lifetime of a <a href="/wiki/Muon" title="Muon">muon</a><br /><b>4–16 μs</b>: The time needed to execute one machine cycle by a 1960s <a href="/wiki/Minicomputer" title="Minicomputer">minicomputer</a> </td></tr> <tr> <td>10<sup>−3</sup> </td> <th scope="row"><a href="/wiki/Millisecond" title="Millisecond">millisecond</a> </th> <td style="text-align: center">ms </td> <td>One thousandth of one second </td> <td><b>1 ms</b>: The time for a neuron in the human brain to fire one impulse and return to rest<sup id="cite_ref-13" class="reference"><a href="#cite_note-13"><span class="cite-bracket">[</span>13<span class="cite-bracket">]</span></a></sup><br /><b>4–8 ms</b>: The typical <a href="/wiki/Seek_time" class="mw-redirect" title="Seek time">seek time</a> for a computer hard disk<br /> </td></tr> <tr> <td>10<sup>−2</sup> </td> <th scope="row">centisecond </th> <td style="text-align: center">cs </td> <td>One hundredth of one second </td> <td><b>1.6667 cs</b>: The period of a frame at a frame rate of 60 Hz.<br /><b>2 cs</b>: The cycle time for European 50 Hz AC electricity <p><b>10–20 cs</b> (=0.1–0.2 s): The human <a href="/wiki/Reflex" title="Reflex">reflex</a> response to visual stimuli </p> </td></tr> <tr> <td>10<sup>−1</sup> </td> <th scope="row">decisecond </th> <td style="text-align: center">ds </td> <td>One tenth of a second </td> <td><b>1–4 ds</b> (=0.1–0.4 s): The length of a single blink of an eye<sup id="cite_ref-14" class="reference"><a href="#cite_note-14"><span class="cite-bracket">[</span>14<span class="cite-bracket">]</span></a></sup><br /> </td></tr></tbody></table> <div class="mw-heading mw-heading2"><h2 id="More_than_one_second">More than one second</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Orders_of_magnitude_(time)&action=edit&section=2" title="Edit section: More than one second"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>In this table, large intervals of time surpassing one second are catalogued in order of the SI multiples of the second as well as their equivalent in common time units of minutes, hours, days, and Julian years. </p> <table class="wikitable plainrowheaders"> <caption>Units of measure greater than one second </caption> <tbody><tr> <th scope="col">Multiple of a second </th> <th scope="col">Unit </th> <th scope="col">Symbol </th> <th scope="col">Common units </th> <th scope="col">Comparative examples and common units </th></tr> <tr> <td>10<sup><span class="nowrap"><span data-sort-value="7000100000000000000♠"></span>1</span></sup> </td> <th scope="row">decasecond </th> <td style="text-align: center">das </td> <td>single seconds <p>(<b>1 das</b> = 10 s) </p> </td> <td><b>6 das</b>: One minute (min), the time it takes a second hand to cycle around a clock face </td></tr> <tr> <td>10<sup><span class="nowrap"><span data-sort-value="7000200000000000000♠"></span>2</span></sup> </td> <th scope="row">hectosecond </th> <td style="text-align: center">hs </td> <td>minutes<br /><i>(<b>1 hs</b> = 1 min 40 s = 100 s)</i> </td> <td><b>2 hs</b> (3 min 20 s): The average length of the most popular YouTube videos as of January 2017<sup id="cite_ref-15" class="reference"><a href="#cite_note-15"><span class="cite-bracket">[</span>15<span class="cite-bracket">]</span></a></sup><br /><b>5.55 hs</b> (9 min 12 s): The longest videos in the above study <p><b>7.1 hs</b> (11 m 50 s): The time for a human walking at average speed of 1.4 <a href="/wiki/Metre_per_second" title="Metre per second">m/s</a> to walk 1 kilometre </p> </td></tr> <tr> <td>10<sup><span class="nowrap"><span data-sort-value="7000300000000000000♠"></span>3</span></sup> </td> <th scope="row">kilosecond </th> <td style="text-align: center">ks </td> <td>minutes, hours, days<br /> <p><i>(<b>1 ks</b> = 16 min 40 s = 1,000 s)</i> </p> </td> <td><b>1 ks</b>: The record confinement time for <a href="/wiki/Antimatter" title="Antimatter">antimatter</a>, specifically <a href="/wiki/Antihydrogen" title="Antihydrogen">antihydrogen</a>, in electrically neutral state as of 2011;<sup id="cite_ref-16" class="reference"><a href="#cite_note-16"><span class="cite-bracket">[</span>16<span class="cite-bracket">]</span></a></sup> 1.477 ks: The longest period in which a person has not taken a breath. <p><b>1.8 ks</b>: The time slot for the typical situation comedy on television with advertisements included <br /> <b>2.28 ks</b>: The duration of the <a href="/wiki/Anglo-Zanzibar_War" title="Anglo-Zanzibar War">Anglo-Zanzibar War</a>, the shortest war in recorded history.<br /> <b>3.6 ks</b>: The length of one hour (h), the time for the minute hand of a clock to cycle once around the face, approximately 1/24 of one <a href="/wiki/Mean_solar_day" class="mw-redirect" title="Mean solar day">mean solar day</a><br /> <b>7.2 ks</b> (2 h): The typical length of feature films </p><p>35.73 ks: the rotational period of planet Jupiter, fastest planet to rotate </p><p>38.0196 ks: rotational period of Saturn, second shortest rotational period </p><p>57.996 ks: one day on planet Neptune. </p><p>62.064 ks: one day on Uranus.<br /> <b>86.399 ks</b> (23 h 59 min 59 s): The length of one day with a removed <a href="/wiki/Leap_second" title="Leap second">leap second</a> on <a href="/wiki/UTC" class="mw-redirect" title="UTC">UTC</a> time scale. Such has not yet occurred.<br /> <b>86.4 ks</b> (24 h): The length of one day of Earth by standard. More exactly, the <a href="/wiki/Mean_solar_day" class="mw-redirect" title="Mean solar day">mean solar day</a> is 86.400 002 ks due to <a href="/wiki/Tidal_braking" class="mw-redirect" title="Tidal braking">tidal braking</a>, and increasing at the rate of approximately 2 ms/century; to correct for this time standards like <a href="/wiki/UTC" class="mw-redirect" title="UTC">UTC</a> use <a href="/wiki/Leap_seconds" class="mw-redirect" title="Leap seconds">leap seconds</a> with the interval described as "a day" on them being most often 86.4 ks exactly by definition but occasionally one second more or less so that every day contains a whole number of seconds while preserving alignment with astronomical time. The hour hand of an analogue clock will typically cycle twice around the dial in this period as most analogue clocks are <a href="/wiki/12-hour_clock" title="12-hour clock">12-hour</a>, less common are analogue <a href="/wiki/24-hour_clock" title="24-hour clock">24-hour clocks</a> in which it cycles around once.<br /> <b>86.401 ks</b> (24 h 0 min 1 s): One day with an added <a href="/wiki/Leap_second" title="Leap second">leap second</a> on <a href="/wiki/UTC" class="mw-redirect" title="UTC">UTC</a> time scale. While this is strictly 24 hours and 1 second in conventional units, a <a href="/wiki/Digital_clock" title="Digital clock">digital clock</a> of suitable capability level will most often display the leap second as 23:59:60 and not 24:00:00 before rolling over to 00:00:00 the next day, as though the last "minute" of the day were crammed with 61 seconds and not 60, and similarly the last "hour" 3601 s instead of 3600.<br /> <b>88.775 ks</b> (24 h 39 min 35 s): One <a href="/wiki/Martian_day" class="mw-redirect" title="Martian day">sol</a> of Mars<br /> <b>604.8 ks</b> (7 d): One week of the <a href="/wiki/Gregorian_calendar" title="Gregorian calendar">Gregorian calendar</a><br /> </p> </td></tr> <tr> <td>10<sup><span class="nowrap"><span data-sort-value="7000600000000000000♠"></span>6</span></sup> </td> <th scope="row">megasecond </th> <td style="text-align: center">Ms </td> <td>weeks to years<br /> <p><i>(<b>1 Ms</b> = 11 d 13 h 46 min 40 s = 1,000,000 s)</i> </p> </td> <td><b>1.6416 Ms</b> (19 d): The length of a month of the <a href="/wiki/Baha%27i_calendar" class="mw-redirect" title="Baha'i calendar">Baha'i calendar</a> <p><b>2.36 Ms</b> (27.32 d): The length of the true month, the <a href="/wiki/Orbital_period" title="Orbital period">orbital period</a> of the <a href="/wiki/Moon" title="Moon">Moon</a><br /> <b>2.4192 Ms</b> (28 d): The length of February, the shortest month of the <a href="/wiki/Gregorian_calendar" title="Gregorian calendar">Gregorian calendar</a>, in common years<br /> <b>2.5056 Ms</b> (29 d): The length of February in leap years<br /> <b>2.592 Ms</b> (30 d): The length of April, June, September, and November in the <a href="/wiki/Gregorian_calendar" title="Gregorian calendar">Gregorian calendar</a>; common interval used in legal agreements and contracts as a proxy for a month<br /> <b>2.6784 Ms</b> (31 d): The length of the longest months of the <a href="/wiki/Gregorian_calendar" title="Gregorian calendar">Gregorian calendar</a><br /> <b>23 Ms</b> (270 d): The approximate length of typical human <a href="/wiki/Gestational_period" class="mw-redirect" title="Gestational period">gestational period</a><br /> <b>31.5576 Ms</b> (365.25 d): The length of the <a href="/wiki/Julian_year_(astronomy)" title="Julian year (astronomy)">Julian year</a>, also called the <i><a href="/wiki/Annum" class="mw-redirect" title="Annum">annum</a></i>, symbol <b>a</b>. </p><p>5.06703168 Ms: The rotational period of Mercury. </p><p>7.600544064 Ms: One year on Mercury. </p><p>19.41414912 Ms: One year on Venus. </p><p>20.9967552 Ms: The rotational period of Venus.<br /> <b>31.55815 Ms</b> (365 d 6 h 9 min 10 s): The length of the true year, the <a href="/wiki/Orbital_period" title="Orbital period">orbital period</a> of the Earth<br /> <b>126.2326 Ms</b> (1461 d 0 h 34 min 40 s): The elected term of the <a href="/wiki/President_of_the_United_States" title="President of the United States">President of the United States</a> or one <a href="/wiki/Olympiad" title="Olympiad">Olympiad</a><br /> </p> </td></tr> <tr> <td>10<sup><span class="nowrap"><span data-sort-value="7000900000000000000♠"></span>9</span></sup> </td> <th scope="row">gigasecond </th> <td style="text-align: center">Gs </td> <td>decades, centuries, millennia<br /> <p><i>(<b>1 Gs</b> = over 31 years and 287 days = 1,000,000,000 s)</i> </p> </td> <td><b>1.5 Gs</b>: <a href="/wiki/Unix_time" title="Unix time">Unix time</a> as of Jul 14 02:40:00 UTC 2017. Unix time being the number of seconds since 1970-01-01T00:00:00Z ignoring leap seconds. <p><b>2.5 Gs</b>: (79 a): The typical human <a href="/wiki/Life_expectancy" title="Life expectancy">life expectancy</a> in the <a href="/wiki/Developed_world" class="mw-redirect" title="Developed world">developed world</a><br /> <b>3.16 Gs</b>: (100 a): One century<br /> <b>31.6 Gs</b>: (1000 a, 1 ka): One <a href="/wiki/Millennium" title="Millennium">millennium</a>, also called a <a href="/wiki/Kilo-annum" class="mw-redirect" title="Kilo-annum">kilo-annum</a> (ka)<br /> <b>63.8 Gs</b>: The approximate time since the beginning of the <a href="/wiki/Anno_Domini" title="Anno Domini">Anno Domini</a> era as of 2019 – 2,019 years, and <i>traditionally</i> the time since the birth of <a href="/wiki/Jesus_Christ" class="mw-redirect" title="Jesus Christ">Jesus Christ</a><br /> <b>194.67 Gs</b>: The approximate lifespan of <a href="/wiki/Time_capsule" title="Time capsule">time capsule</a> <a href="/wiki/Crypt_of_Civilization" title="Crypt of Civilization">Crypt of Civilization</a>, 28 May 1940 – 28 May 8113<br /> <b>363 Gs</b>: (11.5 ka): The time since the beginning of the <a href="/wiki/Holocene_epoch" class="mw-redirect" title="Holocene epoch">Holocene epoch</a><br /> <b>814 Gs</b>: (25.8 ka): The approximate time for the cycle of <a href="/wiki/Axial_precession" title="Axial precession">precession of the Earth's axis</a> </p> </td></tr> <tr> <td>10<sup><span class="nowrap"><span data-sort-value="7001120000000000000♠"></span>12</span></sup> </td> <th scope="row">terasecond </th> <td style="text-align: center">Ts </td> <td>millennia to geological <a href="/wiki/Epoch_(geology)" class="mw-redirect" title="Epoch (geology)">epochs</a><br /> <p><i>(<b>1 Ts</b> = over 31,600 years = 1,000,000,000,000 s)</i> </p> </td> <td><b> 3.1 Ts</b> (100 ka): approximate length of a <a href="/wiki/Glacial_period" title="Glacial period">glacial period</a> of the current <a href="/wiki/Quaternary_glaciation" title="Quaternary glaciation">Quaternary glaciation</a> epoch <p><b>31.6 Ts</b> (1000 ka, 1 Ma): One <a href="/wiki/Mega-annum" class="mw-redirect" title="Mega-annum">mega-annum</a> (Ma), or one million years<br /> <b>79 Ts</b> (2.5 Ma): The approximate time since earliest hominids of genus <i><a href="/wiki/Australopithecus" title="Australopithecus">Australopithecus</a></i><br /> <b>130 Ts</b> (4 Ma): The typical lifetime of a <a href="/wiki/Species_(biology)" class="mw-redirect" title="Species (biology)">biological species</a> on Earth<br /> <b>137 Ts</b> (4.32 Ma): The length of the mythic unit of <i><a href="/wiki/Mahayuga" class="mw-redirect" title="Mahayuga">mahayuga</a></i>, the Great Age, in <a href="/wiki/Hindu_mythology" title="Hindu mythology">Hindu mythology</a>. </p> </td></tr> <tr> <td>10<sup><span class="nowrap"><span data-sort-value="7001150000000000000♠"></span>15</span></sup> </td> <th scope="row">petasecond </th> <td style="text-align: center">Ps </td> <td>geological <a href="/wiki/Era_(geology)" class="mw-redirect" title="Era (geology)">eras</a>, history of Earth and the <a href="/wiki/Universe" title="Universe">Universe</a> </td> <td><b>2 Ps</b>: The approximate time since the <a href="/wiki/Cretaceous-Paleogene_extinction_event" class="mw-redirect" title="Cretaceous-Paleogene extinction event">Cretaceous-Paleogene extinction event</a>, believed to be caused by the impact of a large <a href="/wiki/Asteroid" title="Asteroid">asteroid</a> into <a href="/wiki/Chicxulub_crater" title="Chicxulub crater">Chicxulub</a> in modern-day Mexico. This extinction was one of the largest in Earth's history and marked the demise of most dinosaurs, with the only known exception being the ancestors of today's birds. <p><b>7.9 Ps</b> (250 Ma): The approximate time since the <a href="/wiki/Permian-Triassic_extinction_event" class="mw-redirect" title="Permian-Triassic extinction event">Permian-Triassic extinction event</a>, the actually largest known mass extinction in Earth history which wiped out 95% of all extant species and believed to have been caused by the consequences of massive long-term <a href="/wiki/Volcanic_eruptions" class="mw-redirect" title="Volcanic eruptions">volcanic eruptions</a> in the area of the <a href="/wiki/Siberian_Traps" title="Siberian Traps">Siberian Traps</a>. Also, the approximate time to the <a href="/wiki/Supercontinent" title="Supercontinent">supercontinent</a> of <a href="/wiki/Pangaea" title="Pangaea">Pangaea</a>. Also, the length of one <a href="/wiki/Galactic_year" title="Galactic year">galactic year</a> or <i>cosmic year</i>, the time required for the <a href="/wiki/Sun" title="Sun">Sun</a> to complete one orbit around the <a href="/wiki/Milky_Way_Galaxy" class="mw-redirect" title="Milky Way Galaxy">Milky Way Galaxy</a>.<br /> <b>16 Ps</b> (510 Ma): The approximate time since the <a href="/wiki/Cambrian_explosion" title="Cambrian explosion">Cambrian explosion</a>, a massive evolutionary diversification of life which led to the appearance of most existing <a href="/wiki/Multicellular_organisms" class="mw-redirect" title="Multicellular organisms">multicellular organisms</a> and the replacement of the previous <a href="/wiki/Ediacaran_biota" title="Ediacaran biota">Ediacaran biota</a>. <br /> <b>22 Ps</b> (704 Ma): The approximate <a href="/wiki/Half-life" title="Half-life">half-life</a> of the <a href="/wiki/Uranium" title="Uranium">uranium</a> isotope <sup>235</sup>U.<br /> <b>31.6 Ps</b> (1000 Ma, 1 Ga): One <a href="/wiki/Giga-annum" class="mw-redirect" title="Giga-annum">giga-annum</a> (Ga), one billion years, the largest fixed time unit used in the standard <a href="/wiki/Geological_time_scale" class="mw-redirect" title="Geological time scale">geological time scale</a>, approximately the order of magnitude of an <a href="/wiki/Eon_(geology)" class="mw-redirect" title="Eon (geology)">eon</a>, the largest division of geological time.<br /> <b>+1 Ga</b>: The estimated remaining habitable lifetime of Earth, according to some models. At this point in time the <a href="/wiki/Stellar_evolution" title="Stellar evolution">stellar evolution</a> of the Sun will have increased its <a href="/wiki/Luminosity" title="Luminosity">luminosity</a> to the point that enough energy will be reaching the Earth to cause the evaporation of the oceans and their loss into space (due to the UV flux from the Sun at the top of the atmosphere <a href="/wiki/Photodissociation" title="Photodissociation">dissociating</a> the molecules), making it impossible for any life to continue.<br /> <b>136 Ps</b> (4.32 Ga): The length of the legendary unit <a href="/wiki/Kalpa_(time)" title="Kalpa (time)">Kalpa</a> in <a href="/wiki/Hindu_mythology" title="Hindu mythology">Hindu mythology</a>, or one day (but not including the following night) of the life of <a href="/wiki/Brahma" title="Brahma">Brahma</a>.<br /> <b>143 Ps</b> (4.5 Ga): The <a href="/wiki/Age_of_the_Earth" class="mw-redirect" title="Age of the Earth">age of the Earth</a> by our best estimates. Also the approximate half-life of the uranium isotope <sup>238</sup>U.<br /> <b>315 Ps</b> (10 Ga): The approximate lifetime of a <a href="/wiki/Main-sequence_star" class="mw-redirect" title="Main-sequence star">main-sequence star</a> similar to the <a href="/wiki/Sun" title="Sun">Sun</a>.<br /> <b>434.8 Ps</b> (13.787 Ga): The approximate <a href="/wiki/Age_of_the_Universe" class="mw-redirect" title="Age of the Universe">age of the Universe</a><br /> </p> </td></tr> <tr> <td>10<sup><span class="nowrap"><span data-sort-value="7001180000000000000♠"></span>18</span></sup> </td> <th scope="row"><a href="/wiki/Exa" class="mw-redirect" title="Exa">exasecond</a> </th> <td style="text-align: center">Es </td> <td>future cosmological time </td> <td><i>All times of this length and beyond are currently theoretical as they surpass the elapsed lifetime of the known universe</i>.<br /> <p><b>1.08 Es</b> (+34 Ga): Time to the <a href="/wiki/Big_Rip" title="Big Rip">Big Rip</a> according to some models, but this is not favored by existing data. This is one possible scenario for the <a href="/wiki/Ultimate_fate_of_the_Universe" class="mw-redirect" title="Ultimate fate of the Universe">ultimate fate of the Universe</a>. Under this scenario, <a href="/wiki/Dark_energy" title="Dark energy">dark energy</a> increases in strength and power in a feedback loop that eventually results in the tearing apart of all matter down to subatomic scale due to the rapidly increasing <a href="/wiki/Pressure#Negative_pressures" title="Pressure">negative pressure</a> thereupon<br /> <b>300 – 600 Es</b> (10 – 20 Ta): The estimated lifetime of low-mass stars (<a href="/wiki/Red_dwarfs" class="mw-redirect" title="Red dwarfs">red dwarfs</a>) </p> </td></tr> <tr> <td>10<sup><span class="nowrap"><span data-sort-value="7001210000000000000♠"></span>21</span></sup> </td> <th scope="row"><a href="/wiki/Zetta" class="mw-redirect" title="Zetta">zettasecond</a> </th> <td style="text-align: center">Zs </td> <td> </td> <td><b>3 Zs</b> (+100 Ta): The remaining time until the end of <a href="/wiki/Stelliferous_Era" class="mw-redirect" title="Stelliferous Era">Stelliferous Era</a> of the universe, under the <a href="/wiki/Heat_death_of_the_universe" title="Heat death of the universe">heat death</a> scenario for the <a href="/wiki/Ultimate_fate_of_the_Universe" class="mw-redirect" title="Ultimate fate of the Universe">ultimate fate of the Universe</a>, which is the most commonly-accepted model in the current scientific community. This is marked by the cooling-off of the last low-mass dwarf star to a <a href="/wiki/Black_dwarf" title="Black dwarf">black dwarf</a>. After this time has elapsed, the <a href="/wiki/Degenerate_Era" class="mw-redirect" title="Degenerate Era">Degenerate Era</a> begins. <p><b>9.85 Zs</b> (311 Ta): The entire lifetime of <a href="/wiki/Brahma" title="Brahma">Brahma</a> in <a href="/wiki/Hindu_mythology" title="Hindu mythology">Hindu mythology</a>. </p> </td></tr> <tr> <td>10<sup><span class="nowrap"><span data-sort-value="7001240000000000000♠"></span>24</span></sup> </td> <th scope="row"><a href="/wiki/Yotta" class="mw-redirect" title="Yotta">yottasecond</a> </th> <td style="text-align: center">Ys </td> <td> </td> <td><b>600 Ys</b> (<span class="nowrap"><span data-sort-value="7026631152000000000♠"></span>2<span style="margin-left:0.25em;margin-right:0.15em;">×</span>10<sup>19</sup> a</span>): The radioactive half-life of <a href="/wiki/Bismuth-209" title="Bismuth-209">bismuth-209</a> by <a href="/wiki/Alpha_decay" title="Alpha decay">alpha decay</a>, one of the slowest-observed radioactive decay processes. </td></tr> <tr> <td>10<sup><span class="nowrap"><span data-sort-value="7001270000000000000♠"></span>27</span></sup> </td> <th scope="row"><a href="/wiki/Ronna-" class="mw-redirect" title="Ronna-">ronnasecond</a> </th> <td style="text-align: center">Rs </td> <td> </td> <td><b>3.16 Rs</b> (<span class="nowrap"><span data-sort-value="7027315576000000000♠"></span>1<span style="margin-left:0.25em;margin-right:0.15em;">×</span>10<sup>20</sup> a</span>): The estimated time until all stars are ejected from their galaxies or consumed by black holes. <p><b>32 Rs</b> (<span class="nowrap"><span data-sort-value="7028315576000000000♠"></span>1<span style="margin-left:0.25em;margin-right:0.15em;">×</span>10<sup>21</sup> a</span>): Highest estimate of the time until all stars are ejected from galaxies or consumed by black holes. </p> </td></tr> <tr> <td>10<sup><span class="nowrap"><span data-sort-value="7001300000000000000♠"></span>30</span></sup> <i>and onward</i> </td> <th scope="row">quettasecond <i>and beyond</i> </th> <td style="text-align: center">Qs and on </td> <td> </td> <td><b>69 Qs</b> (<span class="nowrap"><span data-sort-value="7031694267200000000♠"></span>2.2<span style="margin-left:0.25em;margin-right:0.15em;">×</span>10<sup>24</sup> a</span>): The radioactive half-life of <a href="/wiki/Tellurium-128" class="mw-redirect" title="Tellurium-128">tellurium-128</a>, the longest known half-life of any elemental <a href="/wiki/Isotope" title="Isotope">isotope</a>. <p><b>1,340,009 Qs</b> (<span class="nowrap"><span data-sort-value="7036130462431948000♠"></span>4.134<span style="margin-left:.25em;">105</span><span style="margin-left:0.25em;margin-right:0.15em;">×</span>10<sup>28</sup> years</span>): The time period equivalent to the value of 13.13.13.13.13.13.13.13.13.13.13.13.13.13.13.13.13.13.13.13.0.0.0.0 in the <a href="/wiki/Mesoamerican_Long_Count" class="mw-redirect" title="Mesoamerican Long Count">Mesoamerican Long Count</a>, a date discovered on a stele at the <a href="/wiki/Coba" title="Coba">Coba</a> Maya site, believed by archaeologist <a href="/wiki/Linda_Schele" title="Linda Schele">Linda Schele</a> to be the absolute value for the length of one cycle of the universe<sup id="cite_ref-Falk_17-0" class="reference"><a href="#cite_note-Falk-17"><span class="cite-bracket">[</span>17<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-18" class="reference"><a href="#cite_note-18"><span class="cite-bracket">[</span>18<span class="cite-bracket">]</span></a></sup><br /> <b><span class="nowrap"><span data-sort-value="7041260000000000000♠"></span>2.6<span style="margin-left:0.25em;margin-right:0.15em;">×</span>10<sup>11</sup> Qs</span></b> (<span class="nowrap"><span data-sort-value="7041258772319999999♠"></span>8.2<span style="margin-left:0.25em;margin-right:0.15em;">×</span>10<sup>33</sup> years</span>): The smallest possible value for <a href="/wiki/Proton_decay" title="Proton decay">proton half-life</a> consistent with experiment<sup id="cite_ref-19" class="reference"><a href="#cite_note-19"><span class="cite-bracket">[</span>19<span class="cite-bracket">]</span></a></sup> </p><p><b><span class="nowrap"><span data-sort-value="7053100000000000000♠"></span>10<sup>23</sup> Qs</span></b> (<span class="nowrap"><span data-sort-value="7053100984319999999♠"></span>3.2<span style="margin-left:0.25em;margin-right:0.15em;">×</span>10<sup>45</sup> years</span>): The largest possible value for the <a href="/wiki/Proton_decay" title="Proton decay">proton half-life</a>, assuming that the <a href="/wiki/Big_Bang" title="Big Bang">Big Bang</a> was <a href="/wiki/Inflation_(cosmology)" class="mw-redirect" title="Inflation (cosmology)">inflationary</a> and that the same process that made <a href="/wiki/Baryon" title="Baryon">baryons</a> predominate over <a href="/wiki/Antibaryon" class="mw-redirect" title="Antibaryon">antibaryons</a> in the early Universe also makes protons decay<sup id="cite_ref-dying_20-0" class="reference"><a href="#cite_note-dying-20"><span class="cite-bracket">[</span>20<span class="cite-bracket">]</span></a></sup><br /> <b><span class="nowrap"><span data-sort-value="7073600000000000000♠"></span>6<span style="margin-left:0.25em;margin-right:0.15em;">×</span>10<sup>43</sup> Qs</span></b> (<span class="nowrap"><span data-sort-value="7073631152000000000♠"></span>2<span style="margin-left:0.25em;margin-right:0.15em;">×</span>10<sup>66</sup> years</span>): The approximate <a href="/wiki/Hawking_process" class="mw-redirect" title="Hawking process">lifespan</a> of a black hole with the mass of the Sun<sup id="cite_ref-page_21-0" class="reference"><a href="#cite_note-page-21"><span class="cite-bracket">[</span>21<span class="cite-bracket">]</span></a></sup><br /> <b><span class="nowrap"><span data-sort-value="7093400000000000000♠"></span>4<span style="margin-left:0.25em;margin-right:0.15em;">×</span>10<sup>63</sup> Qs</span></b> (<span class="nowrap"><span data-sort-value="7093410248800000000♠"></span>1.3<span style="margin-left:0.25em;margin-right:0.15em;">×</span>10<sup>86</sup> years</span>): The approximate lifespan of <a href="/wiki/Sagittarius_A*" title="Sagittarius A*">Sagittarius A*</a>, if uncharged and non-rotating<sup id="cite_ref-page_21-1" class="reference"><a href="#cite_note-page-21"><span class="cite-bracket">[</span>21<span class="cite-bracket">]</span></a></sup><br /> <b><span class="nowrap"><span data-sort-value="7113540000000000000♠"></span>5.4<span style="margin-left:0.25em;margin-right:0.15em;">×</span>10<sup>83</sup> Qs</span></b> (<span class="nowrap"><span data-sort-value="7113536479200000000♠"></span>1.7<span style="margin-left:0.25em;margin-right:0.15em;">×</span>10<sup>106</sup> years</span>): The approximate lifespan of a <a href="/wiki/Supermassive_black_hole" title="Supermassive black hole">supermassive black hole</a> with a mass of 20 trillion <a href="/wiki/Solar_mass" title="Solar mass">solar masses</a><sup id="cite_ref-page_21-2" class="reference"><a href="#cite_note-page-21"><span class="cite-bracket">[</span>21<span class="cite-bracket">]</span></a></sup><br /> <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle 10^{10^{10^{76.66}}}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <msup> <mn>10</mn> <mrow class="MJX-TeXAtom-ORD"> <msup> <mn>10</mn> <mrow class="MJX-TeXAtom-ORD"> <msup> <mn>10</mn> <mrow class="MJX-TeXAtom-ORD"> <mn>76.66</mn> </mrow> </msup> </mrow> </msup> </mrow> </msup> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle 10^{10^{10^{76.66}}}}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/5c9bdbff7cf32a79114085c9b0e2fae510ecfb8a" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:8.874ex; height:3.509ex;" alt="{\displaystyle 10^{10^{10^{76.66}}}}"></span> Qs: The scale of an estimated <a href="/wiki/Poincar%C3%A9_recurrence_theorem" title="Poincaré recurrence theorem">Poincaré recurrence time</a> for the quantum state of a hypothetical box containing an isolated black hole of stellar mass<sup id="cite_ref-page95_22-0" class="reference"><a href="#cite_note-page95-22"><span class="cite-bracket">[</span>22<span class="cite-bracket">]</span></a></sup> This time assumes a statistical model subject to Poincaré recurrence. A much simplified way of thinking about this time is that in a model in which history <a href="/wiki/Loschmidt%27s_paradox" title="Loschmidt's paradox">repeats itself</a> arbitrarily many times due to <a href="/wiki/Ergodic_hypothesis" title="Ergodic hypothesis">properties of statistical mechanics</a>, this is the time scale when it will first be somewhat similar (for a reasonable choice of "similar") to its current state again.<br /> <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle 10^{10^{10^{123}}}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <msup> <mn>10</mn> <mrow class="MJX-TeXAtom-ORD"> <msup> <mn>10</mn> <mrow class="MJX-TeXAtom-ORD"> <msup> <mn>10</mn> <mrow class="MJX-TeXAtom-ORD"> <mn>123</mn> </mrow> </msup> </mrow> </msup> </mrow> </msup> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle 10^{10^{10^{123}}}}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/9f16b79a689d9dcfb15f16fa8aa53c644561c33a" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:7.835ex; height:3.509ex;" alt="{\displaystyle 10^{10^{10^{123}}}}"></span>Qs: The scale of an estimated Poincaré recurrence time for the quantum state of a hypothetical box containing a black hole with the mass of the observable Universe.<sup id="cite_ref-page95_22-1" class="reference"><a href="#cite_note-page95-22"><span class="cite-bracket">[</span>22<span class="cite-bracket">]</span></a></sup><br /> <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle {10}^{{10}^{{10}^{{10}^{{10}^{1.1}}}}}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <msup> <mrow class="MJX-TeXAtom-ORD"> <mn>10</mn> </mrow> <mrow class="MJX-TeXAtom-ORD"> <msup> <mrow class="MJX-TeXAtom-ORD"> <mn>10</mn> </mrow> <mrow class="MJX-TeXAtom-ORD"> <msup> <mrow class="MJX-TeXAtom-ORD"> <mn>10</mn> </mrow> <mrow class="MJX-TeXAtom-ORD"> <msup> <mrow class="MJX-TeXAtom-ORD"> <mn>10</mn> </mrow> <mrow class="MJX-TeXAtom-ORD"> <msup> <mrow class="MJX-TeXAtom-ORD"> <mn>10</mn> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mn>1.1</mn> </mrow> </msup> </mrow> </msup> </mrow> </msup> </mrow> </msup> </mrow> </msup> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle {10}^{{10}^{{10}^{{10}^{{10}^{1.1}}}}}}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/de482abb9a5a5c5132b5c64f756ee6b8a82321c4" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:10.475ex; height:4.509ex;" alt="{\displaystyle {10}^{{10}^{{10}^{{10}^{{10}^{1.1}}}}}}"></span> Qs (<span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle {10}^{{10}^{{10}^{3,883,775,501,690}}}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <msup> <mrow class="MJX-TeXAtom-ORD"> <mn>10</mn> </mrow> <mrow class="MJX-TeXAtom-ORD"> <msup> <mrow class="MJX-TeXAtom-ORD"> <mn>10</mn> </mrow> <mrow class="MJX-TeXAtom-ORD"> <msup> <mrow class="MJX-TeXAtom-ORD"> <mn>10</mn> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mn>3</mn> <mo>,</mo> <mn>883</mn> <mo>,</mo> <mn>775</mn> <mo>,</mo> <mn>501</mn> <mo>,</mo> <mn>690</mn> </mrow> </msup> </mrow> </msup> </mrow> </msup> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle {10}^{{10}^{{10}^{3,883,775,501,690}}}}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/1e2c67484ac5680688143afee184764946c27a3e" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:15.994ex; height:3.509ex;" alt="{\displaystyle {10}^{{10}^{{10}^{3,883,775,501,690}}}}"></span> years): The scale of an estimated Poincaré recurrence time for the quantum state of a hypothetical box containing a black hole with the estimated mass of the entire Universe, observable or not, assuming Linde's <a href="/wiki/Eternal_inflation" title="Eternal inflation">Chaotic Inflationary</a> model with an <a href="/wiki/Inflaton" title="Inflaton">inflaton</a> whose mass is 10<sup>−6</sup> <a href="/wiki/Planck_units" title="Planck units">Planck masses</a>.<sup id="cite_ref-page95_22-2" class="reference"><a href="#cite_note-page95-22"><span class="cite-bracket">[</span>22<span class="cite-bracket">]</span></a></sup><br /> </p> </td></tr></tbody></table> <table class="wikitable"> <caption>Other </caption> <tbody><tr> <th>Multiples </th> <th>Unit </th> <th>Symbol </th></tr> <tr> <td>6×10<sup>1</sup> seconds </td> <th>1 minute </th> <td>min </td></tr> <tr> <td>6×10<sup>1</sup> minutes </td> <th>1 hour </th> <td>h <i>(hr)</i> </td></tr> <tr> <td>2.4×10<sup>1</sup> hours </td> <th>1 day </th> <td>d </td></tr></tbody></table> <div class="mw-heading mw-heading2"><h2 id="See_also">See also</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Orders_of_magnitude_(time)&action=edit&section=3" title="Edit section: See also"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1184024115">.mw-parser-output .div-col{margin-top:0.3em;column-width:30em}.mw-parser-output .div-col-small{font-size:90%}.mw-parser-output .div-col-rules{column-rule:1px solid #aaa}.mw-parser-output .div-col dl,.mw-parser-output .div-col ol,.mw-parser-output .div-col ul{margin-top:0}.mw-parser-output .div-col li,.mw-parser-output .div-col dd{page-break-inside:avoid;break-inside:avoid-column}</style><div class="div-col" style="column-width: 30em;"> <ul><li><a href="/wiki/Geologic_time_scale" title="Geologic time scale">Geologic time scale</a></li> <li><a href="/wiki/International_System_of_Units" title="International System of Units">International System of Units</a></li> <li><a href="/wiki/Logarithmic_timeline" title="Logarithmic timeline">Logarithmic timeline</a></li> <li><a href="/wiki/Orders_of_magnitude_(frequency)" title="Orders of magnitude (frequency)">Orders of magnitude (frequency)</a></li> <li><a href="/wiki/Planck_units" title="Planck units">Planck units</a></li> <li><a href="/wiki/Scale_(analytical_tool)" title="Scale (analytical tool)">Scale (analytical tool)</a></li> <li><a href="/wiki/Temporal_resolution" title="Temporal resolution">Temporal resolution</a></li> <li><a href="/wiki/Timeline_of_the_far_future" title="Timeline of the far future">Timeline of the far future</a></li> <li><a href="/wiki/Year" title="Year">Year</a></li></ul></div> <div class="mw-heading mw-heading2"><h2 id="References">References</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Orders_of_magnitude_(time)&action=edit&section=4" title="Edit section: References"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1239543626">.mw-parser-output .reflist{margin-bottom:0.5em;list-style-type:decimal}@media screen{.mw-parser-output .reflist{font-size:90%}}.mw-parser-output .reflist .references{font-size:100%;margin-bottom:0;list-style-type:inherit}.mw-parser-output .reflist-columns-2{column-width:30em}.mw-parser-output .reflist-columns-3{column-width:25em}.mw-parser-output .reflist-columns{margin-top:0.3em}.mw-parser-output .reflist-columns ol{margin-top:0}.mw-parser-output .reflist-columns li{page-break-inside:avoid;break-inside:avoid-column}.mw-parser-output .reflist-upper-alpha{list-style-type:upper-alpha}.mw-parser-output .reflist-upper-roman{list-style-type:upper-roman}.mw-parser-output .reflist-lower-alpha{list-style-type:lower-alpha}.mw-parser-output .reflist-lower-greek{list-style-type:lower-greek}.mw-parser-output .reflist-lower-roman{list-style-type:lower-roman}</style><div class="reflist"> <div class="mw-references-wrap mw-references-columns"><ol class="references"> <li id="cite_note-1"><span class="mw-cite-backlink"><b><a href="#cite_ref-1">^</a></b></span> <span class="reference-text"><style data-mw-deduplicate="TemplateStyles:r1238218222">.mw-parser-output cite.citation{font-style:inherit;word-wrap:break-word}.mw-parser-output .citation q{quotes:"\"""\"""'""'"}.mw-parser-output .citation:target{background-color:rgba(0,127,255,0.133)}.mw-parser-output .id-lock-free.id-lock-free 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New York: St. Martin's Press. <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <a href="/wiki/Special:BookSources/978-1429987868" title="Special:BookSources/978-1429987868"><bdi>978-1429987868</bdi></a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=In+search+of+time+the+science+of+a+curious+dimension&rft.place=New+York&rft.pub=St.+Martin%27s+Press&rft.date=2013&rft.isbn=978-1429987868&rft.aulast=Falk&rft.aufirst=Dan&rfr_id=info%3Asid%2Fen.wikipedia.org%3AOrders+of+magnitude+%28time%29" class="Z3988"></span></span> </li> <li id="cite_note-18"><span class="mw-cite-backlink"><b><a href="#cite_ref-18">^</a></b></span> <span class="reference-text">G. Jeffrey MacDonald <a rel="nofollow" class="external text" href="https://www.usatoday.com/tech/science/2007-03-27-maya-2012_n.htm">"Does Maya calendar predict 2012 apocalypse?"</a> <i>USA Today</i> 27 March 2007.</span> </li> <li id="cite_note-19"><span class="mw-cite-backlink"><b><a href="#cite_ref-19">^</a></b></span> <span class="reference-text"> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFNishino,_H._et_al._(Super-K_Collaboration)2009" class="citation journal cs1">Nishino, H. <i>et al.</i> (<a href="/wiki/Super-Kamiokande" title="Super-Kamiokande">Super-K Collaboration</a>) (2009). "Search for Proton Decay via <span style="white-space:nowrap;"><span class="nowrap"><span style="display:inline-block;margin-bottom:-0.3em;vertical-align:0.8em;line-height:1.0em;font-size:80%;text-align:right"><sup style="font-size:inherit;line-height:inherit;vertical-align:baseline"></sup><br /><sub style="font-size:inherit;line-height:inherit;vertical-align:baseline"></sub></span></span>p<span class="nowrap"><span style="display:inline-block;margin-bottom:-0.3em;vertical-align:0.8em;line-height:1.0em;font-size:80%;text-align:left"><sup style="font-size:inherit;line-height:inherit;vertical-align:baseline">+</sup><br /><sub style="font-size:inherit;line-height:inherit;vertical-align:baseline"></sub></span></span></span> → <span style="white-space:nowrap;"><span class="nowrap"><span style="display:inline-block;margin-bottom:-0.3em;vertical-align:0.8em;line-height:1.0em;font-size:80%;text-align:right"><sup style="font-size:inherit;line-height:inherit;vertical-align:baseline"></sup><br /><sub style="font-size:inherit;line-height:inherit;vertical-align:baseline"></sub></span></span>e<span class="nowrap"><span style="display:inline-block;margin-bottom:-0.3em;vertical-align:0.8em;line-height:1.0em;font-size:80%;text-align:left"><sup style="font-size:inherit;line-height:inherit;vertical-align:baseline">+</sup><br /><sub style="font-size:inherit;line-height:inherit;vertical-align:baseline"></sub></span></span></span><span style="white-space:nowrap;"><span class="nowrap"><span style="display:inline-block;margin-bottom:-0.3em;vertical-align:0.8em;line-height:1.0em;font-size:80%;text-align:right"><sup style="font-size:inherit;line-height:inherit;vertical-align:baseline"></sup><br /><sub style="font-size:inherit;line-height:inherit;vertical-align:baseline"></sub></span></span>π<span class="nowrap"><span style="display:inline-block;margin-bottom:-0.3em;vertical-align:0.8em;line-height:1.0em;font-size:80%;text-align:left"><sup style="font-size:inherit;line-height:inherit;vertical-align:baseline">0</sup><br /><sub style="font-size:inherit;line-height:inherit;vertical-align:baseline"></sub></span></span></span> and <span style="white-space:nowrap;"><span class="nowrap"><span style="display:inline-block;margin-bottom:-0.3em;vertical-align:0.8em;line-height:1.0em;font-size:80%;text-align:right"><sup style="font-size:inherit;line-height:inherit;vertical-align:baseline"></sup><br /><sub style="font-size:inherit;line-height:inherit;vertical-align:baseline"></sub></span></span>p<span class="nowrap"><span style="display:inline-block;margin-bottom:-0.3em;vertical-align:0.8em;line-height:1.0em;font-size:80%;text-align:left"><sup style="font-size:inherit;line-height:inherit;vertical-align:baseline">+</sup><br /><sub style="font-size:inherit;line-height:inherit;vertical-align:baseline"></sub></span></span></span> → <span style="white-space:nowrap;"><span class="nowrap"><span style="display:inline-block;margin-bottom:-0.3em;vertical-align:0.8em;line-height:1.0em;font-size:80%;text-align:right"><sup style="font-size:inherit;line-height:inherit;vertical-align:baseline"></sup><br /><sub style="font-size:inherit;line-height:inherit;vertical-align:baseline"></sub></span></span>μ<span class="nowrap"><span style="display:inline-block;margin-bottom:-0.3em;vertical-align:0.8em;line-height:1.0em;font-size:80%;text-align:left"><sup style="font-size:inherit;line-height:inherit;vertical-align:baseline">+</sup><br /><sub style="font-size:inherit;line-height:inherit;vertical-align:baseline"></sub></span></span></span><span style="white-space:nowrap;"><span class="nowrap"><span style="display:inline-block;margin-bottom:-0.3em;vertical-align:0.8em;line-height:1.0em;font-size:80%;text-align:right"><sup style="font-size:inherit;line-height:inherit;vertical-align:baseline"></sup><br /><sub style="font-size:inherit;line-height:inherit;vertical-align:baseline"></sub></span></span>π<span class="nowrap"><span style="display:inline-block;margin-bottom:-0.3em;vertical-align:0.8em;line-height:1.0em;font-size:80%;text-align:left"><sup style="font-size:inherit;line-height:inherit;vertical-align:baseline">0</sup><br /><sub style="font-size:inherit;line-height:inherit;vertical-align:baseline"></sub></span></span></span> in a Large Water Cherenkov Detector". <i><a href="/wiki/Physical_Review_Letters" title="Physical Review Letters">Physical Review Letters</a></i>. <b>102</b> (14): 141801. <a href="/wiki/ArXiv_(identifier)" class="mw-redirect" title="ArXiv (identifier)">arXiv</a>:<span class="id-lock-free" title="Freely accessible"><a rel="nofollow" class="external text" href="https://arxiv.org/abs/0903.0676">0903.0676</a></span>. <a href="/wiki/Bibcode_(identifier)" class="mw-redirect" title="Bibcode (identifier)">Bibcode</a>:<a rel="nofollow" class="external text" href="https://ui.adsabs.harvard.edu/abs/2009PhRvL.102n1801N">2009PhRvL.102n1801N</a>. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1103%2FPhysRevLett.102.141801">10.1103/PhysRevLett.102.141801</a>. <a href="/wiki/PMID_(identifier)" class="mw-redirect" title="PMID (identifier)">PMID</a> <a rel="nofollow" class="external text" href="https://pubmed.ncbi.nlm.nih.gov/19392425">19392425</a>. <a href="/wiki/S2CID_(identifier)" class="mw-redirect" title="S2CID (identifier)">S2CID</a> <a rel="nofollow" class="external text" href="https://api.semanticscholar.org/CorpusID:32385768">32385768</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=Physical+Review+Letters&rft.atitle=Search+for+Proton+Decay+via+%3Cspan+style%3D%22white-space%3Anowrap%3B%22%3E%3Cspan+class%3D%22nowrap%22%3E%3Cspan+style%3D%22display%3Ainline-block%3Bmargin-bottom%3A-0.3em%3Bvertical-align%3A0.8em%3Bline-height%3A1.0em%3Bfont-size%3A80%25%3Btext-align%3Aright%22%3E%3Csup+style%3D%22font-size%3Ainherit%3Bline-height%3Ainherit%3Bvertical-align%3Abaseline%22%3E%3C%2Fsup%3E%3Cbr+%2F%3E%3Csub+style%3D%22font-size%3Ainherit%3Bline-height%3Ainherit%3Bvertical-align%3Abaseline%22%3E%3C%2Fsub%3E%3C%2Fspan%3E%3C%2Fspan%3Ep%3Cspan+class%3D%22nowrap%22%3E%3Cspan+style%3D%22display%3Ainline-block%3Bmargin-bottom%3A-0.3em%3Bvertical-align%3A0.8em%3Bline-height%3A1.0em%3Bfont-size%3A80%25%3Btext-align%3Aleft%22%3E%3Csup+style%3D%22font-size%3Ainherit%3Bline-height%3Ainherit%3Bvertical-align%3Abaseline%22%3E%2B%3C%2Fsup%3E%3Cbr+%2F%3E%3Csub+style%3D%22font-size%3Ainherit%3Bline-height%3Ainherit%3Bvertical-align%3Abaseline%22%3E%3C%2Fsub%3E%3C%2Fspan%3E%3C%2Fspan%3E%3C%2Fspan%3E+%26rarr%3B+%3Cspan+style%3D%22white-space%3Anowrap%3B%22%3E%3Cspan+class%3D%22nowrap%22%3E%3Cspan+style%3D%22display%3Ainline-block%3Bmargin-bottom%3A-0.3em%3Bvertical-align%3A0.8em%3Bline-height%3A1.0em%3Bfont-size%3A80%25%3Btext-align%3Aright%22%3E%3Csup+style%3D%22font-size%3Ainherit%3Bline-height%3Ainherit%3Bvertical-align%3Abaseline%22%3E%3C%2Fsup%3E%3Cbr+%2F%3E%3Csub+style%3D%22font-size%3Ainherit%3Bline-height%3Ainherit%3Bvertical-align%3Abaseline%22%3E%3C%2Fsub%3E%3C%2Fspan%3E%3C%2Fspan%3Ee%3Cspan+class%3D%22nowrap%22%3E%3Cspan+style%3D%22display%3Ainline-block%3Bmargin-bottom%3A-0.3em%3Bvertical-align%3A0.8em%3Bline-height%3A1.0em%3Bfont-size%3A80%25%3Btext-align%3Aleft%22%3E%3Csup+style%3D%22font-size%3Ainherit%3Bline-height%3Ainherit%3Bvertical-align%3Abaseline%22%3E%2B%3C%2Fsup%3E%3Cbr+%2F%3E%3Csub+style%3D%22font-size%3Ainherit%3Bline-height%3Ainherit%3Bvertical-align%3Abaseline%22%3E%3C%2Fsub%3E%3C%2Fspan%3E%3C%2Fspan%3E%3C%2Fspan%3E%3Cspan+style%3D%22white-space%3Anowrap%3B%22%3E%3Cspan+class%3D%22nowrap%22%3E%3Cspan+style%3D%22display%3Ainline-block%3Bmargin-bottom%3A-0.3em%3Bvertical-align%3A0.8em%3Bline-height%3A1.0em%3Bfont-size%3A80%25%3Btext-align%3Aright%22%3E%3Csup+style%3D%22font-size%3Ainherit%3Bline-height%3Ainherit%3Bvertical-align%3Abaseline%22%3E%3C%2Fsup%3E%3Cbr+%2F%3E%3Csub+style%3D%22font-size%3Ainherit%3Bline-height%3Ainherit%3Bvertical-align%3Abaseline%22%3E%3C%2Fsub%3E%3C%2Fspan%3E%3C%2Fspan%3E%26pi%3B%3Cspan+class%3D%22nowrap%22%3E%3Cspan+style%3D%22display%3Ainline-block%3Bmargin-bottom%3A-0.3em%3Bvertical-align%3A0.8em%3Bline-height%3A1.0em%3Bfont-size%3A80%25%3Btext-align%3Aleft%22%3E%3Csup+style%3D%22font-size%3Ainherit%3Bline-height%3Ainherit%3Bvertical-align%3Abaseline%22%3E0%3C%2Fsup%3E%3Cbr+%2F%3E%3Csub+style%3D%22font-size%3Ainherit%3Bline-height%3Ainherit%3Bvertical-align%3Abaseline%22%3E%3C%2Fsub%3E%3C%2Fspan%3E%3C%2Fspan%3E%3C%2Fspan%3E+and+%3Cspan+style%3D%22white-space%3Anowrap%3B%22%3E%3Cspan+class%3D%22nowrap%22%3E%3Cspan+style%3D%22display%3Ainline-block%3Bmargin-bottom%3A-0.3em%3Bvertical-align%3A0.8em%3Bline-height%3A1.0em%3Bfont-size%3A80%25%3Btext-align%3Aright%22%3E%3Csup+style%3D%22font-size%3Ainherit%3Bline-height%3Ainherit%3Bvertical-align%3Abaseline%22%3E%3C%2Fsup%3E%3Cbr+%2F%3E%3Csub+style%3D%22font-size%3Ainherit%3Bline-height%3Ainherit%3Bvertical-align%3Abaseline%22%3E%3C%2Fsub%3E%3C%2Fspan%3E%3C%2Fspan%3Ep%3Cspan+class%3D%22nowrap%22%3E%3Cspan+style%3D%22display%3Ainline-block%3Bmargin-bottom%3A-0.3em%3Bvertical-align%3A0.8em%3Bline-height%3A1.0em%3Bfont-size%3A80%25%3Btext-align%3Aleft%22%3E%3Csup+style%3D%22font-size%3Ainherit%3Bline-height%3Ainherit%3Bvertical-align%3Abaseline%22%3E%2B%3C%2Fsup%3E%3Cbr+%2F%3E%3Csub+style%3D%22font-size%3Ainherit%3Bline-height%3Ainherit%3Bvertical-align%3Abaseline%22%3E%3C%2Fsub%3E%3C%2Fspan%3E%3C%2Fspan%3E%3C%2Fspan%3E+%26rarr%3B+%3Cspan+style%3D%22white-space%3Anowrap%3B%22%3E%3Cspan+class%3D%22nowrap%22%3E%3Cspan+style%3D%22display%3Ainline-block%3Bmargin-bottom%3A-0.3em%3Bvertical-align%3A0.8em%3Bline-height%3A1.0em%3Bfont-size%3A80%25%3Btext-align%3Aright%22%3E%3Csup+style%3D%22font-size%3Ainherit%3Bline-height%3Ainherit%3Bvertical-align%3Abaseline%22%3E%3C%2Fsup%3E%3Cbr+%2F%3E%3Csub+style%3D%22font-size%3Ainherit%3Bline-height%3Ainherit%3Bvertical-align%3Abaseline%22%3E%3C%2Fsub%3E%3C%2Fspan%3E%3C%2Fspan%3E%26mu%3B%3Cspan+class%3D%22nowrap%22%3E%3Cspan+style%3D%22display%3Ainline-block%3Bmargin-bottom%3A-0.3em%3Bvertical-align%3A0.8em%3Bline-height%3A1.0em%3Bfont-size%3A80%25%3Btext-align%3Aleft%22%3E%3Csup+style%3D%22font-size%3Ainherit%3Bline-height%3Ainherit%3Bvertical-align%3Abaseline%22%3E%2B%3C%2Fsup%3E%3Cbr+%2F%3E%3Csub+style%3D%22font-size%3Ainherit%3Bline-height%3Ainherit%3Bvertical-align%3Abaseline%22%3E%3C%2Fsub%3E%3C%2Fspan%3E%3C%2Fspan%3E%3C%2Fspan%3E%3Cspan+style%3D%22white-space%3Anowrap%3B%22%3E%3Cspan+class%3D%22nowrap%22%3E%3Cspan+style%3D%22display%3Ainline-block%3Bmargin-bottom%3A-0.3em%3Bvertical-align%3A0.8em%3Bline-height%3A1.0em%3Bfont-size%3A80%25%3Btext-align%3Aright%22%3E%3Csup+style%3D%22font-size%3Ainherit%3Bline-height%3Ainherit%3Bvertical-align%3Abaseline%22%3E%3C%2Fsup%3E%3Cbr+%2F%3E%3Csub+style%3D%22font-size%3Ainherit%3Bline-height%3Ainherit%3Bvertical-align%3Abaseline%22%3E%3C%2Fsub%3E%3C%2Fspan%3E%3C%2Fspan%3E%26pi%3B%3Cspan+class%3D%22nowrap%22%3E%3Cspan+style%3D%22display%3Ainline-block%3Bmargin-bottom%3A-0.3em%3Bvertical-align%3A0.8em%3Bline-height%3A1.0em%3Bfont-size%3A80%25%3Btext-align%3Aleft%22%3E%3Csup+style%3D%22font-size%3Ainherit%3Bline-height%3Ainherit%3Bvertical-align%3Abaseline%22%3E0%3C%2Fsup%3E%3Cbr+%2F%3E%3Csub+style%3D%22font-size%3Ainherit%3Bline-height%3Ainherit%3Bvertical-align%3Abaseline%22%3E%3C%2Fsub%3E%3C%2Fspan%3E%3C%2Fspan%3E%3C%2Fspan%3E+in+a+Large+Water+Cherenkov+Detector&rft.volume=102&rft.issue=14&rft.pages=141801&rft.date=2009&rft_id=https%3A%2F%2Fapi.semanticscholar.org%2FCorpusID%3A32385768%23id-name%3DS2CID&rft_id=info%3Abibcode%2F2009PhRvL.102n1801N&rft_id=info%3Aarxiv%2F0903.0676&rft_id=info%3Apmid%2F19392425&rft_id=info%3Adoi%2F10.1103%2FPhysRevLett.102.141801&rft.au=Nishino%2C+H.+%27%27et+al.%27%27+%28Super-K+Collaboration%29&rfr_id=info%3Asid%2Fen.wikipedia.org%3AOrders+of+magnitude+%28time%29" class="Z3988"></span></span> </li> <li id="cite_note-dying-20"><span class="mw-cite-backlink"><b><a href="#cite_ref-dying_20-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFAdamsLaughlin1997" class="citation journal cs1">Adams, Fred C.; Laughlin, Gregory (1 April 1997). "A dying universe: the long-term fate and evolution of astrophysical objects". <i>Reviews of Modern Physics</i>. <b>69</b> (2): 337–372. <a href="/wiki/ArXiv_(identifier)" class="mw-redirect" title="ArXiv (identifier)">arXiv</a>:<span class="id-lock-free" title="Freely accessible"><a rel="nofollow" class="external text" href="https://arxiv.org/abs/astro-ph/9701131">astro-ph/9701131</a></span>. <a href="/wiki/Bibcode_(identifier)" class="mw-redirect" title="Bibcode (identifier)">Bibcode</a>:<a rel="nofollow" class="external text" href="https://ui.adsabs.harvard.edu/abs/1997RvMP...69..337A">1997RvMP...69..337A</a>. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1103%2Frevmodphys.69.337">10.1103/revmodphys.69.337</a>. <a href="/wiki/ISSN_(identifier)" class="mw-redirect" title="ISSN (identifier)">ISSN</a> <a rel="nofollow" class="external text" href="https://search.worldcat.org/issn/0034-6861">0034-6861</a>. <a href="/wiki/S2CID_(identifier)" class="mw-redirect" title="S2CID (identifier)">S2CID</a> <a rel="nofollow" class="external text" href="https://api.semanticscholar.org/CorpusID:12173790">12173790</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=Reviews+of+Modern+Physics&rft.atitle=A+dying+universe%3A+the+long-term+fate+and+evolution+of+astrophysical+objects&rft.volume=69&rft.issue=2&rft.pages=337-372&rft.date=1997-04-01&rft_id=https%3A%2F%2Fapi.semanticscholar.org%2FCorpusID%3A12173790%23id-name%3DS2CID&rft_id=info%3Abibcode%2F1997RvMP...69..337A&rft_id=info%3Aarxiv%2Fastro-ph%2F9701131&rft.issn=0034-6861&rft_id=info%3Adoi%2F10.1103%2Frevmodphys.69.337&rft.aulast=Adams&rft.aufirst=Fred+C.&rft.au=Laughlin%2C+Gregory&rfr_id=info%3Asid%2Fen.wikipedia.org%3AOrders+of+magnitude+%28time%29" class="Z3988"></span></span> </li> <li id="cite_note-page-21"><span class="mw-cite-backlink">^ <a href="#cite_ref-page_21-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-page_21-1"><sup><i><b>b</b></i></sup></a> <a href="#cite_ref-page_21-2"><sup><i><b>c</b></i></sup></a></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFPage1976" class="citation journal cs1">Page, Don N. (15 January 1976). "Particle emission rates from a black hole: Massless particles from an uncharged, nonrotating hole". <i>Physical Review D</i>. <b>13</b> (2). American Physical Society (APS): 198–206. <a href="/wiki/Bibcode_(identifier)" class="mw-redirect" title="Bibcode (identifier)">Bibcode</a>:<a rel="nofollow" class="external text" href="https://ui.adsabs.harvard.edu/abs/1976PhRvD..13..198P">1976PhRvD..13..198P</a>. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1103%2Fphysrevd.13.198">10.1103/physrevd.13.198</a>. <a href="/wiki/ISSN_(identifier)" class="mw-redirect" title="ISSN (identifier)">ISSN</a> <a rel="nofollow" class="external text" href="https://search.worldcat.org/issn/0556-2821">0556-2821</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=Physical+Review+D&rft.atitle=Particle+emission+rates+from+a+black+hole%3A+Massless+particles+from+an+uncharged%2C+nonrotating+hole&rft.volume=13&rft.issue=2&rft.pages=198-206&rft.date=1976-01-15&rft.issn=0556-2821&rft_id=info%3Adoi%2F10.1103%2Fphysrevd.13.198&rft_id=info%3Abibcode%2F1976PhRvD..13..198P&rft.aulast=Page&rft.aufirst=Don+N.&rfr_id=info%3Asid%2Fen.wikipedia.org%3AOrders+of+magnitude+%28time%29" class="Z3988"></span> See in particular equation (27).</span> </li> <li id="cite_note-page95-22"><span class="mw-cite-backlink">^ <a href="#cite_ref-page95_22-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-page95_22-1"><sup><i><b>b</b></i></sup></a> <a href="#cite_ref-page95_22-2"><sup><i><b>c</b></i></sup></a></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFPage1994" class="citation book cs1">Page, Don N. (25 November 1994). "Information Loss in Black Holes and/or Conscious Beings?". In Fulling, S.A. (ed.). <i>Heat Kernel Techniques and Quantum Gravity</i>. Discourses in Mathematics and its Applications. Texas A&M University. p. 461. <a href="/wiki/ArXiv_(identifier)" class="mw-redirect" title="ArXiv (identifier)">arXiv</a>:<span class="id-lock-free" title="Freely accessible"><a rel="nofollow" class="external text" href="https://arxiv.org/abs/hep-th/9411193">hep-th/9411193</a></span>. <a href="/wiki/Bibcode_(identifier)" class="mw-redirect" title="Bibcode (identifier)">Bibcode</a>:<a rel="nofollow" class="external text" href="https://ui.adsabs.harvard.edu/abs/1994hep.th...11193P">1994hep.th...11193P</a>. <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <a href="/wiki/Special:BookSources/978-0-9630728-3-2" title="Special:BookSources/978-0-9630728-3-2"><bdi>978-0-9630728-3-2</bdi></a>. <a href="/wiki/S2CID_(identifier)" class="mw-redirect" title="S2CID (identifier)">S2CID</a> <a rel="nofollow" class="external text" href="https://api.semanticscholar.org/CorpusID:18633007">18633007</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=bookitem&rft.atitle=Information+Loss+in+Black+Holes+and%2For+Conscious+Beings%3F&rft.btitle=Heat+Kernel+Techniques+and+Quantum+Gravity&rft.series=Discourses+in+Mathematics+and+its+Applications&rft.pages=461&rft.pub=Texas+A%26M+University&rft.date=1994-11-25&rft_id=info%3Aarxiv%2Fhep-th%2F9411193&rft_id=https%3A%2F%2Fapi.semanticscholar.org%2FCorpusID%3A18633007%23id-name%3DS2CID&rft_id=info%3Abibcode%2F1994hep.th...11193P&rft.isbn=978-0-9630728-3-2&rft.aulast=Page&rft.aufirst=Don+N.&rfr_id=info%3Asid%2Fen.wikipedia.org%3AOrders+of+magnitude+%28time%29" class="Z3988"></span></span> </li> </ol></div></div> <div class="mw-heading mw-heading2"><h2 id="External_links">External links</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Orders_of_magnitude_(time)&action=edit&section=5" title="Edit section: External links"><span>edit</span></a><span 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aria-labelledby="Orders_of_magnitude" style="padding:3px"><table class="nowraplinks hlist mw-collapsible autocollapse navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><style data-mw-deduplicate="TemplateStyles:r1239400231">.mw-parser-output .navbar{display:inline;font-size:88%;font-weight:normal}.mw-parser-output .navbar-collapse{float:left;text-align:left}.mw-parser-output .navbar-boxtext{word-spacing:0}.mw-parser-output .navbar ul{display:inline-block;white-space:nowrap;line-height:inherit}.mw-parser-output .navbar-brackets::before{margin-right:-0.125em;content:"[ "}.mw-parser-output .navbar-brackets::after{margin-left:-0.125em;content:" ]"}.mw-parser-output .navbar li{word-spacing:-0.125em}.mw-parser-output .navbar a>span,.mw-parser-output .navbar a>abbr{text-decoration:inherit}.mw-parser-output .navbar-mini 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title="Special:EditPage/Template:Orders of magnitude"><abbr title="Edit this template">e</abbr></a></li></ul></div><div id="Orders_of_magnitude" style="font-size:114%;margin:0 4em"><a href="/wiki/Order_of_magnitude" title="Order of magnitude">Orders of magnitude</a></div></th></tr><tr><th scope="row" class="navbox-group" style="width:1%">Quantity</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Orders_of_magnitude_(acceleration)" title="Orders of magnitude (acceleration)">Acceleration</a></li> <li><a href="/wiki/Orders_of_magnitude_(angular_momentum)" title="Orders of magnitude (angular momentum)">Angular momentum</a></li> <li><a href="/wiki/Orders_of_magnitude_(area)" title="Orders of magnitude (area)">Area</a></li> <li><a href="/wiki/Orders_of_magnitude_(bit_rate)" title="Orders of magnitude (bit rate)">Bit rate</a></li> <li><a href="/wiki/Orders_of_magnitude_(charge)" title="Orders of magnitude (charge)">Charge</a></li> <li><a href="/wiki/Computer_performance_by_orders_of_magnitude" title="Computer performance by orders of magnitude">Computing</a></li> <li><a href="/wiki/Orders_of_magnitude_(current)" title="Orders of magnitude (current)">Current</a></li> <li><a href="/wiki/Orders_of_magnitude_(data)" title="Orders of magnitude (data)">Data</a></li> <li><a href="/wiki/Orders_of_magnitude_(density)" class="mw-redirect" title="Orders of magnitude (density)">Density</a></li> <li><a href="/wiki/Orders_of_magnitude_(energy)" title="Orders of magnitude (energy)">Energy</a> / <a href="/wiki/Energy_density_Extended_Reference_Table" title="Energy density Extended Reference Table">Energy density</a></li> <li><a href="/wiki/Orders_of_magnitude_(entropy)" title="Orders of magnitude (entropy)">Entropy</a></li> <li><a href="/wiki/Orders_of_magnitude_(force)" title="Orders of magnitude (force)">Force</a></li> <li><a href="/wiki/Orders_of_magnitude_(frequency)" title="Orders of magnitude (frequency)">Frequency</a></li> <li><a href="/wiki/Orders_of_magnitude_(illuminance)" title="Orders of magnitude (illuminance)">Illuminance</a></li> <li><a href="/wiki/Orders_of_magnitude_(length)" title="Orders of magnitude (length)">Length</a></li> <li><a href="/wiki/Orders_of_magnitude_(luminance)" class="mw-redirect" title="Orders of magnitude (luminance)">Luminance</a></li> <li><a href="/wiki/Orders_of_magnitude_(magnetic_moment)" title="Orders of magnitude (magnetic moment)">Magnetic moment</a></li> <li><a href="/wiki/Orders_of_magnitude_(magnetic_field)" title="Orders of magnitude (magnetic field)">Magnetic field</a></li> <li><a href="/wiki/Orders_of_magnitude_(mass)" title="Orders of magnitude (mass)">Mass</a></li> <li><a href="/wiki/Orders_of_magnitude_(molar_concentration)" title="Orders of magnitude (molar concentration)">Molarity</a></li> <li><a href="/wiki/Orders_of_magnitude_(numbers)" title="Orders of magnitude (numbers)">Numbers</a></li> <li><a href="/wiki/Orders_of_magnitude_(power)" title="Orders of magnitude (power)">Power</a></li> <li><a href="/wiki/Orders_of_magnitude_(pressure)" title="Orders of magnitude (pressure)">Pressure</a></li> <li><a href="/wiki/Orders_of_magnitude_(probability)" title="Orders of magnitude (probability)">Probability</a></li> <li><a href="/wiki/Orders_of_magnitude_(radiation)" title="Orders of magnitude (radiation)">Radiation</a></li> <li><a href="/wiki/Sound_pressure#Examples_of_sound_pressure" title="Sound pressure">Sound pressure</a></li> <li><a href="/wiki/Orders_of_magnitude_(specific_heat_capacity)" title="Orders of magnitude (specific heat capacity)">Specific heat capacity</a></li> <li><a href="/wiki/Orders_of_magnitude_(speed)" title="Orders of magnitude (speed)">Speed</a></li> <li><a href="/wiki/Orders_of_magnitude_(temperature)" title="Orders of magnitude (temperature)">Temperature</a></li> <li><a href="/wiki/Orders_of_magnitude_(torque)" title="Orders of magnitude (torque)">Torque</a></li> <li><a class="mw-selflink selflink">Time</a></li> <li><a href="/wiki/Orders_of_magnitude_(voltage)" title="Orders of magnitude (voltage)">Voltage</a></li> <li><a href="/wiki/Orders_of_magnitude_(volume)" title="Orders of magnitude (volume)">Volume</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">See also</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Back-of-the-envelope_calculation" title="Back-of-the-envelope calculation">Back-of-the-envelope calculation</a></li> <li><a href="/wiki/Electronics_industry#List_of_best-selling_electronic_devices" title="Electronics industry">Best-selling electronic devices</a></li> <li><a href="/wiki/Fermi_problem" title="Fermi problem">Fermi problem</a></li> <li><a href="/wiki/Power_of_10" title="Power of 10">Powers of 10</a> and <a href="/wiki/Decade_(log_scale)" title="Decade (log scale)">decades</a> <ul><li><a href="/wiki/Decimal" title="Decimal">10th</a></li> <li><a href="/wiki/Hundredth" title="Hundredth">100th</a></li> <li><a href="/wiki/Millionth" title="Millionth">1000000th</a></li></ul></li> <li><a href="/wiki/Metric_prefix" title="Metric prefix">Metric (SI) prefix</a></li> <li><a href="/wiki/Macroscopic_scale" title="Macroscopic scale">Macroscopic scale</a></li> <li><a href="/wiki/Microscopic_scale" title="Microscopic scale">Microscopic scale</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Related</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Astronomical_system_of_units" title="Astronomical system of units">Astronomical system of units</a></li> <li><a href="/wiki/Location_of_Earth" title="Location of Earth">Earth's location in the Universe</a></li> <li><i><a href="/wiki/Cosmic_View" title="Cosmic View">Cosmic View</a></i> (1957 book)</li> <li><i><a href="/wiki/To_the_Moon_and_Beyond" title="To the Moon and Beyond">To the Moon and Beyond</a></i> (1964 film)</li> <li><i><a href="/wiki/Cosmic_Zoom" title="Cosmic Zoom">Cosmic Zoom</a></i> (1968 film)</li> <li><a href="/wiki/Powers_of_Ten_(film)" title="Powers of Ten (film)"><i>Powers of Ten</i> (1968 and 1977 films)</a></li> <li><a href="/wiki/Cosmic_Voyage_(1996_film)" title="Cosmic Voyage (1996 film)"><i>Cosmic Voyage</i> (1996 documentary)</a></li> <li><i><a href="/wiki/The_Scale_of_the_Universe" title="The Scale of the Universe">The Scale of the Universe</a></i> (2010)</li> <li><i><a href="/wiki/Cosmic_Eye" title="Cosmic Eye">Cosmic Eye</a></i> (2012)</li></ul> </div></td></tr><tr><td class="navbox-abovebelow" colspan="2"><div> <ul><li><span class="noviewer" typeof="mw:File"><span title="Category"><img alt="" src="//upload.wikimedia.org/wikipedia/en/thumb/9/96/Symbol_category_class.svg/16px-Symbol_category_class.svg.png" decoding="async" width="16" height="16" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/9/96/Symbol_category_class.svg/23px-Symbol_category_class.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/9/96/Symbol_category_class.svg/31px-Symbol_category_class.svg.png 2x" data-file-width="180" data-file-height="185" /></span></span> <a href="/wiki/Category:Orders_of_magnitude" title="Category:Orders of magnitude">Category</a></li></ul> </div></td></tr></tbody></table></div> <div class="navbox-styles"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236075235"></div><div role="navigation" class="navbox" aria-labelledby="Time_measurement_and_standards" style="padding:3px"><table class="nowraplinks hlist mw-collapsible autocollapse navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th scope="col" class="navbox-title" colspan="3"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1239400231"><div class="navbar plainlinks hlist navbar-mini"><ul><li class="nv-view"><a href="/wiki/Template:Time_measurement_and_standards" title="Template:Time measurement and standards"><abbr title="View this template">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:Time_measurement_and_standards" title="Template talk:Time measurement and standards"><abbr title="Discuss this template">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:Time_measurement_and_standards" title="Special:EditPage/Template:Time measurement and standards"><abbr title="Edit this template">e</abbr></a></li></ul></div><div id="Time_measurement_and_standards" style="font-size:114%;margin:0 4em"><a href="/wiki/Time" title="Time">Time measurement</a> and <a href="/wiki/Time_standard" title="Time standard">standards</a></div></th></tr><tr><td class="navbox-abovebelow" colspan="3"><div> <ul><li><a href="/wiki/Chronometry" title="Chronometry">Chronometry</a></li> <li><a class="mw-selflink selflink">Orders of magnitude</a></li> <li><a href="/wiki/Time_metrology" class="mw-redirect" title="Time metrology">Metrology</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">International standards</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Coordinated_Universal_Time" title="Coordinated Universal Time">Coordinated Universal Time</a> <ul><li><a href="/wiki/UTC_offset" title="UTC offset">offset</a></li></ul></li> <li><a href="/wiki/Universal_Time" title="Universal Time">UT</a></li> <li><a href="/wiki/%CE%94T_(timekeeping)" title="ΔT (timekeeping)">ΔT</a></li> <li><a href="/wiki/DUT1" title="DUT1">DUT1</a></li> <li><a href="/wiki/International_Earth_Rotation_and_Reference_Systems_Service" title="International Earth Rotation and Reference Systems Service">International Earth Rotation and Reference Systems Service</a></li> <li><a href="/wiki/ISO_31-1" title="ISO 31-1">ISO 31-1</a></li> <li><a href="/wiki/ISO_8601" title="ISO 8601">ISO 8601</a></li> <li><a href="/wiki/International_Atomic_Time" title="International Atomic Time">International Atomic Time</a></li> <li><a href="/wiki/12-hour_clock" title="12-hour clock">12-hour clock</a></li> <li><a href="/wiki/24-hour_clock" title="24-hour clock">24-hour clock</a></li> <li><a href="/wiki/Barycentric_Coordinate_Time" title="Barycentric Coordinate Time">Barycentric Coordinate Time</a></li> <li><a href="/wiki/Barycentric_Dynamical_Time" title="Barycentric Dynamical Time">Barycentric Dynamical Time</a></li> <li><a href="/wiki/Civil_time" title="Civil time">Civil time</a></li> <li><a href="/wiki/Daylight_saving_time" title="Daylight saving time">Daylight saving time</a></li> <li><a href="/wiki/Geocentric_Coordinate_Time" title="Geocentric Coordinate Time">Geocentric Coordinate Time</a></li> <li><a href="/wiki/International_Date_Line" title="International Date Line">International Date Line</a></li> <li><a href="/wiki/IERS_Reference_Meridian" title="IERS Reference Meridian">IERS Reference Meridian</a></li> <li><a href="/wiki/Leap_second" title="Leap second">Leap second</a></li> <li><a href="/wiki/Solar_time" title="Solar time">Solar time</a></li> <li><a href="/wiki/Terrestrial_Time" title="Terrestrial Time">Terrestrial Time</a></li> <li><a href="/wiki/Time_zone" title="Time zone">Time zone</a></li> <li><a href="/wiki/180th_meridian" title="180th meridian">180th meridian</a></li></ul> </div></td><td class="noviewer navbox-image" rowspan="9" style="width:1px;padding:0 0 0 2px"><div><span typeof="mw:File"><a href="/wiki/Hourglass" title="Hourglass"><img alt="template illustration" src="//upload.wikimedia.org/wikipedia/commons/thumb/7/70/Marine_sandglass_MMM.jpg/75px-Marine_sandglass_MMM.jpg" decoding="async" width="75" height="175" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/7/70/Marine_sandglass_MMM.jpg/113px-Marine_sandglass_MMM.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/7/70/Marine_sandglass_MMM.jpg/150px-Marine_sandglass_MMM.jpg 2x" data-file-width="1637" data-file-height="3819" /></a></span><br /><span typeof="mw:File"><a href="/wiki/Time_zone" title="Time zone"><img alt="template illustration" src="//upload.wikimedia.org/wikipedia/commons/thumb/6/63/Aleutian_Islands_with_180th_meridian_and_International_Date_Line_%28cropped%29.png/75px-Aleutian_Islands_with_180th_meridian_and_International_Date_Line_%28cropped%29.png" decoding="async" width="75" height="152" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/6/63/Aleutian_Islands_with_180th_meridian_and_International_Date_Line_%28cropped%29.png/113px-Aleutian_Islands_with_180th_meridian_and_International_Date_Line_%28cropped%29.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/6/63/Aleutian_Islands_with_180th_meridian_and_International_Date_Line_%28cropped%29.png/150px-Aleutian_Islands_with_180th_meridian_and_International_Date_Line_%28cropped%29.png 2x" data-file-width="496" data-file-height="1007" /></a></span></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Obsolete standards</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Ephemeris_time" title="Ephemeris time">Ephemeris time</a></li> <li><a href="/wiki/Greenwich_Mean_Time" title="Greenwich Mean Time">Greenwich Mean Time</a></li> <li><a href="/wiki/Prime_meridian" title="Prime meridian">Prime meridian</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Time_in_physics" title="Time in physics">Time in physics</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Absolute_space_and_time" title="Absolute space and time">Absolute space and time</a></li> <li><a href="/wiki/Spacetime" title="Spacetime">Spacetime</a></li> <li><a href="/wiki/Chronon" title="Chronon">Chronon</a></li> <li><a href="/wiki/Continuous_signal" class="mw-redirect" title="Continuous signal">Continuous signal</a></li> <li><a href="/wiki/Coordinate_time" title="Coordinate time">Coordinate time</a></li> <li><a href="/wiki/Cosmological_decade" title="Cosmological decade">Cosmological decade</a></li> <li><a href="/wiki/Discrete_time_and_continuous_time" title="Discrete time and continuous time">Discrete time and continuous time</a></li> <li><a href="/wiki/Proper_time" title="Proper time">Proper time</a></li> <li><a href="/wiki/Theory_of_relativity" title="Theory of relativity">Theory of relativity</a></li> <li><a href="/wiki/Time_dilation" title="Time dilation">Time dilation</a></li> <li><a href="/wiki/Gravitational_time_dilation" title="Gravitational time dilation">Gravitational time dilation</a></li> <li><a href="/wiki/Time_domain" title="Time domain">Time domain</a></li> <li><a href="/wiki/Time-translation_symmetry" title="Time-translation symmetry">Time-translation symmetry</a></li> <li><a href="/wiki/T-symmetry" title="T-symmetry">T-symmetry</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Horology" class="mw-redirect" title="Horology">Horology</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Clock" title="Clock">Clock</a></li> <li><a href="/wiki/Astrarium" title="Astrarium">Astrarium</a></li> <li><a href="/wiki/Atomic_clock" title="Atomic clock">Atomic clock</a></li> <li><a href="/wiki/Complication_(horology)" title="Complication (horology)">Complication</a></li> <li><a href="/wiki/History_of_timekeeping_devices" title="History of timekeeping devices">History of timekeeping devices</a></li> <li><a href="/wiki/Hourglass" title="Hourglass">Hourglass</a></li> <li><a href="/wiki/Marine_chronometer" title="Marine chronometer">Marine chronometer</a></li> <li><a href="/wiki/Marine_sandglass" title="Marine sandglass">Marine sandglass</a></li> <li><a href="/wiki/Radio_clock" title="Radio clock">Radio clock</a></li> <li><a href="/wiki/Watch" title="Watch">Watch</a> <ul><li><a href="/wiki/Stopwatch" title="Stopwatch">stopwatch</a></li></ul></li> <li><a href="/wiki/Water_clock" title="Water clock">Water clock</a></li> <li><a href="/wiki/Sundial" title="Sundial">Sundial</a></li> <li><a href="/wiki/Dialing_scales" title="Dialing scales">Dialing scales</a></li> <li><a href="/wiki/Equation_of_time" title="Equation of time">Equation of time</a></li> <li><a href="/wiki/History_of_sundials" title="History of sundials">History of sundials</a></li> <li><a href="/wiki/Schema_for_horizontal_dials" title="Schema for horizontal dials">Sundial markup schema</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Calendar" title="Calendar">Calendar</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Gregorian_calendar" title="Gregorian calendar">Gregorian</a></li> <li><a href="/wiki/Hebrew_calendar" title="Hebrew calendar">Hebrew</a></li> <li><a href="/wiki/Hindu_calendar" title="Hindu calendar">Hindu</a></li> <li><a href="/wiki/Holocene_calendar" title="Holocene calendar">Holocene</a></li> <li><a href="/wiki/Islamic_calendar" title="Islamic calendar">Islamic</a> (lunar Hijri)</li> <li><a href="/wiki/Julian_calendar" title="Julian calendar">Julian</a></li> <li><a href="/wiki/Solar_Hijri_calendar" title="Solar Hijri calendar">Solar Hijri</a></li> <li><a href="/wiki/Astronomical_year_numbering" title="Astronomical year numbering">Astronomical</a></li> <li><a href="/wiki/Dominical_letter" title="Dominical letter">Dominical letter</a></li> <li><a href="/wiki/Epact" title="Epact">Epact</a></li> <li><a href="/wiki/Equinox" title="Equinox">Equinox</a></li> <li><a href="/wiki/Intercalation_(timekeeping)" title="Intercalation (timekeeping)">Intercalation</a></li> <li><a href="/wiki/Julian_day" title="Julian day">Julian day</a></li> <li><a href="/wiki/Leap_year" title="Leap year">Leap year</a></li> <li><a href="/wiki/Lunar_calendar" title="Lunar calendar">Lunar</a></li> <li><a href="/wiki/Lunisolar_calendar" title="Lunisolar calendar">Lunisolar</a></li> <li><a href="/wiki/Solar_calendar" title="Solar calendar">Solar</a></li> <li><a href="/wiki/Solstice" title="Solstice">Solstice</a></li> <li><a href="/wiki/Tropical_year" title="Tropical year">Tropical year</a></li> <li><a href="/wiki/Determination_of_the_day_of_the_week" title="Determination of the day of the week">Weekday determination</a></li> <li><a href="/wiki/Names_of_the_days_of_the_week" title="Names of the days of the week">Weekday names</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Archaeology and geology</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Chronological_dating" title="Chronological dating">Chronological dating</a></li> <li><a href="/wiki/Geologic_time_scale" title="Geologic time scale">Geologic time scale</a></li> <li><a href="/wiki/International_Commission_on_Stratigraphy" title="International Commission on Stratigraphy">International Commission on Stratigraphy</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Astronomical_chronology" title="Astronomical chronology">Astronomical chronology</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Galactic_year" title="Galactic year">Galactic year</a></li> <li><a href="/wiki/Nuclear_timescale" title="Nuclear timescale">Nuclear timescale</a></li> <li><a href="/wiki/Precession" title="Precession">Precession</a></li> <li><a href="/wiki/Sidereal_time" title="Sidereal time">Sidereal time</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Other <a href="/wiki/Unit_of_time" title="Unit of time">units of time</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Instant" title="Instant">Instant</a></li> <li><a href="/wiki/Flick_(time)" title="Flick (time)">Flick</a></li> <li><a href="/wiki/Shake_(unit)" title="Shake (unit)">Shake</a></li> <li><a href="/wiki/Jiffy_(time)" title="Jiffy (time)">Jiffy</a></li> <li><a href="/wiki/Second" title="Second">Second</a></li> <li><a href="/wiki/Minute" title="Minute">Minute</a></li> <li><a href="/wiki/Moment_(unit)" title="Moment (unit)">Moment</a></li> <li><a href="/wiki/Hour" title="Hour">Hour</a></li> <li><a href="/wiki/Day" title="Day">Day</a></li> <li><a href="/wiki/Week" title="Week">Week</a></li> <li><a href="/wiki/Fortnight" title="Fortnight">Fortnight</a></li> <li><a href="/wiki/Month" title="Month">Month</a></li> <li><a href="/wiki/Year" title="Year">Year</a></li> <li><a href="/wiki/Olympiad" title="Olympiad">Olympiad</a></li> <li><a href="/wiki/Lustrum" title="Lustrum">Lustrum</a></li> <li><a href="/wiki/Decade" title="Decade">Decade</a></li> <li><a href="/wiki/Century" title="Century">Century</a></li> <li><a href="/wiki/Saeculum" title="Saeculum">Saeculum</a></li> <li><a href="/wiki/Millennium" title="Millennium">Millennium</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Related topics</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Chronology" title="Chronology">Chronology</a></li> <li><a href="/wiki/Duration_(philosophy)" title="Duration (philosophy)">Duration</a> <ul><li><a href="/wiki/Duration_(music)" title="Duration (music)">music</a></li></ul></li> <li><a href="/wiki/Mental_chronometry" title="Mental chronometry">Mental chronometry</a></li> <li><a href="/wiki/Decimal_time" title="Decimal time">Decimal time</a></li> <li><a href="/wiki/Metric_time" title="Metric time">Metric time</a></li> <li><a href="/wiki/System_time" title="System time">System time</a></li> <li><a href="/wiki/Time_metrology" class="mw-redirect" title="Time metrology">Time metrology</a></li> <li><a href="/wiki/Time_value_of_money" title="Time value of money">Time value of money</a></li> <li><a href="/wiki/Timekeeper" title="Timekeeper">Timekeeper</a></li></ul> </div></td></tr></tbody></table></div> <div class="navbox-styles"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236075235"></div><div role="navigation" class="navbox" aria-labelledby="Orders_of_magnitude_of_time" style="padding:3px"><table class="nowraplinks mw-collapsible autocollapse navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1239400231"><div class="navbar plainlinks hlist navbar-mini"><ul><li class="nv-view"><a href="/wiki/Template:Orders_of_magnitude_(time)" title="Template:Orders of magnitude (time)"><abbr title="View this 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href="/wiki/Attosecond" title="Attosecond">attosecond</a></li> <li><a href="/wiki/Femtosecond" title="Femtosecond">femtosecond</a></li> <li><a href="/wiki/Picosecond" title="Picosecond">picosecond</a></li> <li><a href="/wiki/Nanosecond" title="Nanosecond">nanosecond</a></li> <li><a href="/wiki/Microsecond" title="Microsecond">microsecond</a></li> <li><a href="/wiki/Millisecond" title="Millisecond">millisecond</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Positive powers</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Second" title="Second">second</a></li> <li><a href="/wiki/Kilosecond" class="mw-redirect" title="Kilosecond">kilosecond</a></li> <li><a href="/wiki/Megasecond" class="mw-redirect" title="Megasecond">megasecond</a></li> <li><a href="/wiki/Gigasecond" class="mw-redirect" title="Gigasecond">gigasecond</a></li> <li><a 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