「宇宙のテスラ車」、位置を知らせる追跡サイト--打ち上げから5年

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TagProvider.displayAd('10721_9757')}catch(err){}</script></div></div></div>  <div class="leaf-header-pagination"> </div> <div class="leaf-article-inner block_story">   <div id="NWrelart:Body" class="article_body"> <p>　寒くて人を寄せつけない宇宙空間を漂っている存在についても、「光陰矢の如し」は当てはまるだろうか。SpaceXが初めて<a href="https://japan.cnet.com/article/35114347/">強力な新型ロケット「Falcon Heavy」を試験発射</a>してから、5年が経過した。2018年2月6日の打ち上げでは、SpaceXの創業者Elon Musk氏が所有する「Tesla Roadster」も積まれ、宇宙へ飛び立った。そして、あの車はまだ宇宙をドライブしている。</p> <div class="center img-xxxl"> <img src="/storage/2023/02/08/0d2e08fb242d78378cdae945a2d8f93b/screen-shot-2018-02-08-at-12-07-40-pm-1-1.jpg" alt="提供：SpaceX"><br> 提供：SpaceX </div> <p>　では現在、Roadsterの正確な位置は分かるのだろうか。それを教えてくれる便利なウェブサイトがある。</p> <p>　「<a href="https://www.whereisroadster.com/" target="_blank">Whereisroadster.com</a>」は2018年から運営されており、宇宙を旅する車を追跡している。サイトを開設したBen Pearson氏は、Roadsterが宇宙で5周年を迎えるにあたり、「打ち上げ以来火星の軌道をまたぐのは4回目」になると<a href="https://twitter.com/whereisroadster/status/1620171320695873537" target="_blank">ツイートした</a>。</p> <div class="center img-xxxl"> <img src="/storage/2023/02/08/32a685c2eb121343b6ceed5cca56ada6/feb6roadster.jpg" alt="Roadsterの位置を示す図"><br> 提供：Ben Pearson/Whereisroadster.com </div> <p>　このRoadsterは、太陽の周回軌道を約557日で1周する。Pearson氏のサイトによると、移動した距離は、保証走行距離である3万6000マイル（約5万8000km）の7万倍以上になるという。</p> <p>　研究者らは、Roadsterがいつか地球に衝突する可能性をすでに調べており、その確率を100万年以内に6％と計算した。また、この車が最初に地球に接近するのは2091年のことだが、それでも数十万km弱の距離があると推計した。</p> <div class="leaf_body_foot"><p>この記事は海外Red Ventures発の<a href="https://www.cnet.com/science/space/heres-where-elon-musks-tesla-is-after-5-years-in-space/" target="_blank" class="original_link">記事</a>を朝日インタラクティブが日本向けに編集したものです。</p></div> </div>   <div id="gtm-trigger-article-read-complete" style="width:1px; height:1px;"></div></div> <div id="article_under_nllink" class="js-log-out" style="margin: 15px 0; padding: 20px 30px; background-color: #f0f0f0; text-align: center;"> <p>CNET Japanの記事を毎朝メールでまとめ読み（無料）</p> <button type="button" id="btn-mail-subscription" 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