유성 | 유성 | 태양계 | 천문학습관

<!DOCTYPE html> <html lang="ko">     <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=Edge" /> <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no"> <meta name="description" content=""> <meta name="author" content=""> <meta name="keyword" content=""> <link rel="shortcut icon" href="/resources/images/favicon.ico"> <title> 유성 | 유성 | 태양계 | 천문학습관 | 천문우주지식정보 </title> <link href="/resources/css/bootstrap.css" rel="stylesheet"> <link href="/resources/css/datepicker.css" rel="stylesheet"> <link href="/resources/css/common.css" rel="stylesheet"> <link href="/resources/css/font-awesome.min.css" rel="stylesheet"> <link href="/resources/css/print.css" rel="stylesheet"> <script type="text/javascript" src="/resources/js/jquery.min.js"></script> <script type="text/javascript" src="/resources/js/jquery.easing.js"></script> <script type="text/javascript" src="/resources/js/common.js"></script> <script type="text/javascript" src="/resources/js/nav.js"></script> <script type="text/javascript" src="/resources/js/content.js"></script> <script type="text/javascript" src="/resources/js/jquery.matchHeight-min.js"></script> <script type="text/javascript" src="/resources/js/kasiSns.js"></script>   <link href="/resources/css/layout.css" rel="stylesheet"> <link href="/resources/css/contents-type.css" rel="stylesheet"> <link href="/resources/css/contents-board.css" rel="stylesheet">   <link href="/resources/css/kr_access.css" rel="stylesheet"> <script type="text/javascript"> (function(H){H.className=H.className.replace(/\bno-js\b/,'js')})(document.documentElement) </script> <script type="text/javascript" src="/resources/js/common.js"></script> <script type="text/javascript" src="/resources/js/bbsCommon.js"></script> <script type="text/javascript"> //천문학습관_인코딩 변환 처리. function unicode2Utf ( param ) { //alert(param); var regExp = /\&#([0-9]*)/g; var result = param.match(regExp); var utf = ""; if ( result != null ) { for (var i=0; i<result.length; i++) { utf += String.fromCharCode(result[i].replace("&#", "")); } return utf; } } $(function(){ var menu_1_name = $('#location_wrap .location > div[class="dropdown"]').eq(0).find('a').find('span').text(); //var page_seq = '5175'; //천문학습관. if ( '천문학습관' == menu_1_name ) { //if ( page_seq > 5026 && page_seq < 6367 ) { //유니코드 변환처리. $('.content_wrap uni').each(function(){ $(this).text(unicode2Utf($(this).text())); }); $("table").each(function(){ var table_class = $(this).attr('class'); $(this).removeAttr('class'); $(this).prop('class','table tbl_cnt tbl_border'); if ( table_class != undefined && table_class.indexOf('tbl_border_none') > -1 ) { $(this).addClass('tbl_border_none'); } }); $("div[class^='lea_img'] img").each(function(index){ $(this).attr('data-toggle','modal'); $(this).attr('data-target','#lea_modal'+index); var img_alt = $(this).attr('alt'); if ( img_alt == undefined ) { img_alt = ''; $(this).attr('alt',''); } //img 클릭 시, 모달로 크게 보기. $("div[class='content_wrap']").append('<div class="modal lea_modal Submodal fade" id="lea_modal' + index + '" tabindex="-1" role="dialog" aria-labelledby="myModalLabel" aria-hidden="true"><div class="modal-dialog"><button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">×</span></button><img src="' + $(this).attr('src') + '" alt="' + img_alt + '" /></div></div>'); }); } //파일 다운로드 $("a[downaftnm]:not(a[preview])").each(function(){ $(this).prop("href", "javascript:downLocation('" + $(this).attr('downaftnm') + "','" + $(this).attr('downbefnm') + "');"); $(this).prop("onkeypress", "this.onclick();"); $(this).removeAttr('downaftnm'); $(this).removeAttr('downbefnm'); $(this).removeAttr('target'); }); //파일 미리보기 $("a[preview]").each(function(){ $(this).prop("href", "javascript:filePreview('" + $(this).attr('downaftnm') + "','','/content/view');"); $(this).prop("onkeypress", "this.onclick();"); $(this).removeAttr('downaftnm'); $(this).removeAttr('downbefnm'); $(this).removeAttr('preview'); $(this).removeAttr('target'); }); }); </script> </head> <body>  <div id="accessibility"> <a href="#cont_skip">본문 바로가기</a> <a href="#header_wrap">메뉴바로가기</a> </div>   <div id="sub_wrap">  <script type="text/javascript" src="/resources/js/search/search.js"></script> <script type="text/javascript"> $(function(){ if($(".depth_3").length || $(".tab").length || $(".step").length){ $(".depth_3 li a, .tab li a, .step li .cont").matchHeight({ byRow: true, property: 'height', target: null, remove: false }); } //메뉴 var navMenu = $("#nav li"), childUl = $('ul'); $.fn.showMenu = function() { return $(this).children(childUl).stop().addClass('on'); } $.fn.hideMenu = function() { return $(this).children(childUl).stop().removeClass('on'); } navMenu.mouseover($.fn.showMenu); navMenu.mouseleave($.fn.hideMenu); navMenu.focusin($.fn.showMenu); navMenu.next().focusin(function(){ $(this).siblings().children(childUl).stop().removeClass('on'); }); navMenu.next('li:last').focusout(function(){ navMenu.children(childUl).stop().removeClass('on'); }); // 서브메뉴 포커스 추가 $('.home>a').focus(function(){ $('div[class="location"] div:eq(1)>ul').hide(); }) $('div[class="location"] div:eq(1)>a').focus(function(){ $('div[class="location"] div:eq(1)>ul').show(); $('div[class="location"] div:eq(2)>ul').hide(); }) $('div[class="location"] div:eq(2)>a').focus(function(){ $('div[class="location"] div:eq(1)>ul').hide(); $('div[class="location"] div:eq(2)>ul').show(); $('div[class="location"] div:eq(3)>ul').hide(); }) $('div[class="location"] div:eq(3)>a').focus(function(){ $('div[class="location"] div:eq(2)>ul').hide(); $('div[class="location"] div:eq(3)>ul').show(); $('div[class="location"] div:eq(4)>ul').hide(); }) $('div[class="location"] div:eq(4)>a').focus(function(){ $('div[class="location"] div:eq(3)>ul').hide(); $('div[class="location"] div:eq(4)>ul').show(); }) $('.facebook').focus(function(){ $('div[class="location"] div:eq(2)>ul').hide(); $('div[class="location"] div:eq(3)>ul').hide(); $('div[class="location"] div:eq(4)>ul').hide(); }) $('a[href="#header_wrap"]').on('click',function(){ setTimeout(function(){ $('div[class="header grab"] nav ul li:eq(0) a:eq(0)').focus(); },0) }) $('a[href="#gnb"]').on('click',function(){ setTimeout(function(){ $('div[class="header grab"] nav ul li:eq(0) a:eq(0)').focus(); },0) }) }); </script>  <header id="header_wrap"> <div class="header grab"> <h1><a class="navbar-brand" href="/index"> <img src="/resources/images/logo.png" alt="KASI 한국천문연구원 천문우주지식정보" class="sub_logo"> <img src="/resources/images/main_logo.png" alt="KASI 한국천문연구원 천문우주지식정보" class="main_logo"> <img src="/resources/images/common/logo_mobile.png" alt="KASI 천문우주지식정보" class="sub_logo mobile_logo"> <img src="/resources/images/common/logo_mobile_w.png" alt="KASI 천문우주지식정보" class="sub_logo mobile_logo_w"> </a></h1> <nav id="gnb"> <h2 class="sr-only">주메뉴</h2> <ul id="nav" class="nav"> <li> <a href="/life/pageView/39">생활천문관</a> <ul> <li> <a href="/life/pageView/8">음양력변환계산</a> </li> <li> <a href="/life/pageView/5">월별 음양력</a> </li> <li> <a href="/life/post/calendarData">달력자료(월력요항)</a> </li> <li> <a href="/life/pageView/9">일출일몰시각계산</a> </li> <li> <a href="/life/pageView/6">월별 해/달 출몰시각</a> </li> <li> <a href="/life/pageView/10">태양 고도/방위각계산</a> </li> <li> <a href="/life/pageView/7">월별 천문현상</a> </li> </ul> </li> <li> <a href="/learning/pageView/40" class="active">천문학습관</a> <ul> <li> <a href="/learning/pageView/5108">태양계</a> </li> <li> <a href="/learning/pageView/6233">일식</a> </li> <li> <a href="/learning/pageView/5934">월식</a> </li> <li> <a href="/learning/pageView/6372">천체</a> </li> <li> <a href="/learning/pageView/5204">천체물리학</a> </li> <li> <a href="/learning/pageView/5053">우주탐사</a> </li> <li> <a href="/learning/pageView/5058">별자리</a> </li> <li> <a href="/learning/pageView/5064">망원경</a> </li> <li> <a href="/learning/post/educationVideo">천문우주 동영상</a> </li> <li> <a href="/learning/pageView/6384">천문학자</a> </li> <li> <a href="/learning/pageView/1623">논문</a> </li> </ul> </li> <li> <a href="/almanac/pageView/41">천문기록관</a> <ul> <li> <a href="/almanac/pageView/26?file=/file/astro_almanac_pdf/20231023135218580.pdf">역서별</a> </li> <li> <a href="/almanac/pageView/27">연도별</a> </li> <li> <a href="/almanac/pageView/24">천문 기록 검색</a> </li> </ul> </li> <li> <a href="/publicdata/pageView/6437">공공데이터</a> <ul> <li> <a href="/publicdata/pageView/6438">은하중심 24시</a> </li> <li> <a href="/publicdata/pageView/6441">우리의 별 태양</a> </li> <li> <a href="/publicdata/pageView/6445">우주로부터의 라디오 방송</a> </li> </ul> </li> <li> <a href="/community/post/faq">천문지식참여</a> <ul> <li> <a href="/community/post/faq">자주하는 질문</a> </li> </ul> </li> <li> <a href="/information/pageView/31">정보공개&활용</a> <ul> <li> <a href="/information/pageView/31">Open API</a> </li> <li> <a href="/information/ticker/pageView/32">티커서비스</a> </li> <li> <a href="">천문갤러리</a> </li> </ul> </li> </ul> <a href='#' class="mobile-nav-link"></a> </nav>  <div class="header_btn"> <a href="#none" title="사이트맵 바로가기" class="sitemap" data-toggle="modal" data-target="#siteMapModal"><i class="ico_sitemap"><span class="sr-only">사이트맵</span></i></a> <a href="#" title="통합검색 바로가기" class="search" id="btnSearch"><i class="ico_search"><span class="sr-only">검색</span></i></a> </div>  </div> <nav class="mobile_nav"> <div class="nav-menu"> <div class="top-btn"> <a href="#" data-toggle="modal" data-target="#siteMapModal" class="b_sitemap">사이트맵</a> <a href="/search/search" class="b_search">통합검색</a> </div> <div class="panel-group" id="accordion" role="tablist" aria-multiselectable="true"> <div class="depth1"> <a data-toggle="collapse" class="collapsed" role="tab" data-parent="#accordion" href="#depth1_1" aria-expanded="true" aria-controls="depth1_1"> 생활천문관 </a> <div id="depth1_1" class="depth2 collapse" role="tabpanel" aria-labelledby="depth1_1"> <div class="depth2_list"> <a href="/life/pageView/8">음양력변환계산</a> </div> <div class="depth2_list"> <a href="/life/pageView/5">월별 음양력</a> </div> <div class="depth2_list"> <div class="depth3"> <a data-toggle="collapse" role="tab" data-parent="#accordion" href="#depth1_03" aria-expanded="true" aria-controls="depth1_03"> 달력자료(월력요항) </a> <div id="depth1_03" class="depth2 collapse" role="tabpanel" aria-labelledby="depth1_03"> <div class="depth3_list"><a href="/life/post/calendarData">달력자료</a></div> <div class="depth3_list"><a href="/life/post/almanac">월력요항</a></div> </div> </div> </div> <div class="depth2_list"> <a href="/life/pageView/9">일출일몰시각계산</a> </div> <div class="depth2_list"> <a href="/life/pageView/6">월별 해/달 출몰시각</a> </div> <div class="depth2_list"> <a href="/life/pageView/10">태양 고도/방위각계산</a> </div> <div class="depth2_list"> <a href="/life/pageView/7">월별 천문현상</a> </div> </div> </div> <div class="depth1"> <a data-toggle="collapse" class="collapsed" role="tab" data-parent="#accordion" href="#depth1_2" aria-expanded="true" aria-controls="depth1_2"> 천문학습관 </a> <div id="depth1_2" class="depth2 collapse" role="tabpanel" aria-labelledby="depth1_2"> <div class="depth2_list"> <div class="depth3"> <a data-toggle="collapse" role="tab" data-parent="#accordion" href="#depth2_01" aria-expanded="true" aria-controls="depth2_01"> 태양계 </a> <div id="depth2_01" class="depth2 collapse" role="tabpanel" aria-labelledby="depth2_01"> <div class="depth3_list"><a href="/learning/pageView/5108">태양계 개요</a></div> <div class="depth3_list"><a href="/learning/pageView/5123">태양</a></div> <div class="depth3_list"><a href="/learning/pageView/5132">수성</a></div> <div class="depth3_list"><a href="/learning/pageView/5135">금성</a></div> <div class="depth3_list"><a href="/learning/pageView/5138">지구</a></div> <div class="depth3_list"><a href="/learning/pageView/5145">화성</a></div> <div class="depth3_list"><a href="/learning/pageView/5148">목성</a></div> <div class="depth3_list"><a href="/learning/pageView/5152">토성</a></div> <div class="depth3_list"><a href="/learning/pageView/5157">천왕성</a></div> <div class="depth3_list"><a href="/learning/pageView/5161">해왕성</a></div> <div class="depth3_list"><a href="/learning/pageView/5165">왜소행성</a></div> <div class="depth3_list"><a href="/learning/pageView/5168">소행성</a></div> <div class="depth3_list"><a href="/learning/pageView/5172">혜성</a></div> <div class="depth3_list"><a href="/learning/pageView/5175">유성</a></div> <div class="depth3_list"><a href="/learning/pageView/5027">카이퍼 벨트</a></div> <div class="depth3_list"><a href="/learning/pageView/5028">오르트 구름</a></div> <div class="depth3_list"><a href="/learning/pageView/5178">우주천문학</a></div> </div> </div> </div> <div class="depth2_list"> <div class="depth3"> <a data-toggle="collapse" role="tab" data-parent="#accordion" href="#depth2_02" aria-expanded="true" aria-controls="depth2_02"> 일식 </a> <div id="depth2_02" class="depth2 collapse" role="tabpanel" aria-labelledby="depth2_02"> <div class="depth3_list"><a href="/learning/pageView/6299">1991~2000</a></div> <div class="depth3_list"><a href="/learning/pageView/6189">2001~2010</a></div> <div class="depth3_list"><a href="/learning/pageView/6209">2011~2020</a></div> <div class="depth3_list"><a href="/learning/pageView/6233">2021~2030<span class="label">2024</span></a></div> <div class="depth3_list"><a href="/learning/pageView/6255">2031~2040</a></div> <div class="depth3_list"><a href="/learning/pageView/6277">2041~2050</a></div> </div> </div> </div> <div class="depth2_list"> <div class="depth3"> <a data-toggle="collapse" role="tab" data-parent="#accordion" href="#depth2_03" aria-expanded="true" aria-controls="depth2_03"> 월식 </a> <div id="depth2_03" class="depth2 collapse" role="tabpanel" aria-labelledby="depth2_03"> <div class="depth3_list"><a href="/learning/pageView/5773">1951~1960</a></div> <div class="depth3_list"><a href="/learning/pageView/5796">1961~1970</a></div> <div class="depth3_list"><a href="/learning/pageView/5819">1971~1980</a></div> <div class="depth3_list"><a href="/learning/pageView/5842">1981~1990</a></div> <div class="depth3_list"><a href="/learning/pageView/5888">1991~2000</a></div> <div class="depth3_list"><a href="/learning/pageView/5864">2001~2010</a></div> <div class="depth3_list"><a href="/learning/pageView/5911">2011~2020</a></div> <div class="depth3_list"><a href="/learning/pageView/5934">2021~2030<span class="label">2024</span></a></div> <div class="depth3_list"><a href="/learning/pageView/5956">2031~2040</a></div> <div class="depth3_list"><a href="/learning/pageView/5979">2041~2050</a></div> <div class="depth3_list"><a href="/learning/pageView/6322">2051~2060</a></div> <div class="depth3_list"><a href="/learning/pageView/6345">2061~2070</a></div> </div> </div> </div> <div class="depth2_list"> <div class="depth3"> <a data-toggle="collapse" role="tab" data-parent="#accordion" href="#depth2_04" aria-expanded="true" aria-controls="depth2_04"> 천체 </a> <div id="depth2_04" class="depth2 collapse" role="tabpanel" aria-labelledby="depth2_04"> <div class="depth3_list"><a href="/learning/pageView/6372">항성</a></div> <div class="depth3_list"><a href="/learning/pageView/5198">성운과 성단</a></div> <div class="depth3_list"><a href="/learning/pageView/5201">은하</a></div> <div class="depth3_list"><a href="/learning/pageView/5038">메시에 목록</a></div> </div> </div> </div> <div class="depth2_list"> <div class="depth3"> <a data-toggle="collapse" role="tab" data-parent="#accordion" href="#depth2_05" aria-expanded="true" aria-controls="depth2_05"> 천체물리학 </a> <div id="depth2_05" class="depth2 collapse" role="tabpanel" aria-labelledby="depth2_05"> <div class="depth3_list"><a href="/learning/pageView/5204">행성의 거리</a></div> <div class="depth3_list"><a href="/learning/pageView/5206">밝기</a></div> <div class="depth3_list"><a href="/learning/pageView/5208">스펙트럼</a></div> <div class="depth3_list"><a href="/learning/pageView/5042">색깔과 온도</a></div> <div class="depth3_list"><a href="/learning/pageView/5209">별의 위치</a></div> <div class="depth3_list"><a href="/learning/pageView/5214">별의 거리</a></div> <div class="depth3_list"><a href="/learning/pageView/5224">천체역학</a></div> <div class="depth3_list"><a href="/learning/pageView/5230">역학</a></div> <div class="depth3_list"><a href="/learning/pageView/6387">이론</a></div> <div class="depth3_list"><a href="/learning/pageView/6380">우주론</a></div> <div class="depth3_list"><a href="/learning/pageView/5048">천문단위</a></div> </div> </div> </div> <div class="depth2_list"> <div class="depth3"> <a data-toggle="collapse" role="tab" data-parent="#accordion" href="#depth2_06" aria-expanded="true" aria-controls="depth2_06"> 우주탐사 </a> <div id="depth2_06" class="depth2 collapse" role="tabpanel" aria-labelledby="depth2_06"> <div class="depth3_list"><a href="/learning/pageView/5053">로켓의 발달</a></div> <div class="depth3_list"><a href="/learning/pageView/5054">우주왕복선</a></div> <div class="depth3_list"><a href="/learning/pageView/5258">태양계 탐사</a></div> <div class="depth3_list"><a href="/learning/pageView/5262">외계행성 찾기</a></div> <div class="depth3_list"><a href="/learning/pageView/5264">외계생명체 찾기</a></div> </div> </div> </div> <div class="depth2_list"> <div class="depth3"> <a data-toggle="collapse" role="tab" data-parent="#accordion" href="#depth2_07" aria-expanded="true" aria-controls="depth2_07"> 별자리 </a> <div id="depth2_07" class="depth2 collapse" role="tabpanel" aria-labelledby="depth2_07"> <div class="depth3_list"><a href="/learning/pageView/5058">별자리 기원</a></div> <div class="depth3_list"><a href="/learning/pageView/5059">별자리 상식</a></div> <div class="depth3_list"><a href="/learning/pageView/5267">북반구의 별자리</a></div> <div class="depth3_list"><a href="/learning/pageView/5272">별자리 전설</a></div> <div class="depth3_list"><a href="/learning/pageView/5324">별자리 구성</a></div> <div class="depth3_list"><a href="/learning/pageView/5376">동양의 별자리</a></div> </div> </div> </div> <div class="depth2_list"> <div class="depth3"> <a data-toggle="collapse" role="tab" data-parent="#accordion" href="#depth2_08" aria-expanded="true" aria-controls="depth2_08"> 망원경 </a> <div id="depth2_08" class="depth2 collapse" role="tabpanel" aria-labelledby="depth2_08"> <div class="depth3_list"><a href="/learning/pageView/5064">역사</a></div> <div class="depth3_list"><a href="/learning/pageView/5387">원리</a></div> <div class="depth3_list"><a href="/learning/pageView/5390">종류</a></div> <div class="depth3_list"><a href="/learning/pageView/5394">가대</a></div> <div class="depth3_list"><a href="/learning/pageView/5396">활용</a></div> <div class="depth3_list"><a href="/learning/pageView/5069">선택방법</a></div> <div class="depth3_list"><a href="/learning/pageView/5402">관련부품</a></div> <div class="depth3_list"><a href="/learning/pageView/6388">국내천문대</a></div> <div class="depth3_list"><a href="/learning/pageView/6394">세계의 망원경</a></div> <div class="depth3_list"><a href="/learning/pageView/5384">고천문의기</a></div> </div> </div> </div> <div class="depth2_list"> <div class="depth3"> <a 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type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">×</span></button><div class="sr-only">모달창 닫기</div> </div> </div>   <section id="container" class="container" tabindex="0"> <div id="printbody">  <div class="panel-group left_nav" role="tablist" aria-multiselectable="true"> <div class="panel panel-default"> <a data-toggle="collapse" role="tab" id="leftNav1" data-parent="#accordion" href="#leftNav1_drop" aria-expanded="true" aria-controls="leftNavleftNav1_drop" class="active"> 태양계 </a> <ul id="leftNav1_drop" class="panel-collapse collapse in" role="tabpanel" aria-labelledby="leftNav1"> <li> <a href="/learning/pageView/5108">태양계 개요 </a> </li> <li> <a href="/learning/pageView/5123">태양 </a> </li> <li> <a href="/learning/pageView/5132">수성 </a> </li> <li> <a href="/learning/pageView/5135">금성 </a> </li> <li> <a href="/learning/pageView/5138">지구 </a> </li> <li> <a href="/learning/pageView/5145">화성 </a> </li> <li> <a href="/learning/pageView/5148">목성 </a> </li> <li> <a href="/learning/pageView/5152">토성 </a> </li> <li> <a href="/learning/pageView/5157">천왕성 </a> </li> <li> <a href="/learning/pageView/5161">해왕성 </a> </li> <li> <a href="/learning/pageView/5165">왜소행성 </a> </li> <li> <a href="/learning/pageView/5168">소행성 </a> </li> <li> <a href="/learning/pageView/5172">혜성 </a> </li> <li> <a href="/learning/pageView/5175" class="active">유성 </a> </li> <li> <a href="/learning/pageView/5027">카이퍼 벨트 </a> </li> <li> <a href="/learning/pageView/5028">오르트 구름 </a> </li> <li> <a href="/learning/pageView/5178">우주천문학 </a> </li> </ul> <a data-toggle="collapse" role="tab" id="leftNav2" data-parent="#accordion" href="#leftNav2_drop" aria-expanded="true" aria-controls="leftNav2_drop"> 일식 </a> <ul id="leftNav2_drop" class="panel-collapse collapse" role="tabpanel" aria-labelledby="leftNav2"> <li> <a href="/learning/pageView/6299">1991~2000 </a> </li> <li> <a href="/learning/pageView/6189">2001~2010 </a> </li> <li> <a href="/learning/pageView/6209">2011~2020 </a> </li> <li> <a href="/learning/pageView/6233">2021~2030 <span class="label">2024</span> </a> </li> <li> <a href="/learning/pageView/6255">2031~2040 </a> </li> <li> <a href="/learning/pageView/6277">2041~2050 </a> </li> </ul> <a data-toggle="collapse" role="tab" id="leftNav3" data-parent="#accordion" href="#leftNav3_drop" aria-expanded="true" aria-controls="leftNav3_drop"> 월식 </a> <ul id="leftNav3_drop" class="panel-collapse collapse" role="tabpanel" aria-labelledby="leftNav3"> <li> <a href="/learning/pageView/5773">1951~1960 </a> </li> <li> <a href="/learning/pageView/5796">1961~1970 </a> </li> <li> <a href="/learning/pageView/5819">1971~1980 </a> </li> <li> <a href="/learning/pageView/5842">1981~1990 </a> </li> <li> <a href="/learning/pageView/5888">1991~2000 </a> </li> <li> <a href="/learning/pageView/5864">2001~2010 </a> </li> <li> <a href="/learning/pageView/5911">2011~2020 </a> </li> <li> <a href="/learning/pageView/5934">2021~2030 <span class="label">2024</span> </a> </li> <li> <a href="/learning/pageView/5956">2031~2040 </a> </li> <li> <a href="/learning/pageView/5979">2041~2050 </a> </li> <li> <a href="/learning/pageView/6322">2051~2060 </a> </li> <li> <a href="/learning/pageView/6345">2061~2070 </a> </li> </ul> <a data-toggle="collapse" role="tab" id="leftNav4" data-parent="#accordion" href="#leftNav4_drop" aria-expanded="true" aria-controls="leftNav4_drop"> 천체 </a> <ul id="leftNav4_drop" class="panel-collapse collapse" role="tabpanel" aria-labelledby="leftNav4"> <li> <a href="/learning/pageView/6372">항성 </a> </li> <li> <a href="/learning/pageView/5198">성운과 성단 </a> </li> <li> <a href="/learning/pageView/5201">은하 </a> </li> <li> <a href="/learning/pageView/5038">메시에 목록 </a> </li> </ul> <a data-toggle="collapse" role="tab" id="leftNav5" data-parent="#accordion" href="#leftNav5_drop" aria-expanded="true" aria-controls="leftNav5_drop"> 천체물리학 </a> <ul id="leftNav5_drop" class="panel-collapse collapse" role="tabpanel" aria-labelledby="leftNav5"> <li> <a href="/learning/pageView/5204">행성의 거리 </a> </li> <li> <a href="/learning/pageView/5206">밝기 </a> </li> <li> <a href="/learning/pageView/5208">스펙트럼 </a> </li> <li> <a href="/learning/pageView/5042">색깔과 온도 </a> </li> <li> <a href="/learning/pageView/5209">별의 위치 </a> </li> <li> <a href="/learning/pageView/5214">별의 거리 </a> </li> <li> <a href="/learning/pageView/5224">천체역학 </a> </li> <li> <a href="/learning/pageView/5230">역학 </a> </li> <li> <a href="/learning/pageView/6387">이론 </a> </li> <li> <a href="/learning/pageView/6380">우주론 </a> </li> <li> <a href="/learning/pageView/5048">천문단위 </a> </li> </ul> <a data-toggle="collapse" role="tab" id="leftNav6" data-parent="#accordion" href="#leftNav6_drop" aria-expanded="true" aria-controls="leftNav6_drop"> 우주탐사 </a> <ul id="leftNav6_drop" class="panel-collapse collapse" role="tabpanel" aria-labelledby="leftNav6"> <li> <a href="/learning/pageView/5053">로켓의 발달 </a> </li> <li> <a href="/learning/pageView/5054">우주왕복선 </a> </li> <li> <a href="/learning/pageView/5258">태양계 탐사 </a> </li> <li> <a href="/learning/pageView/5262">외계행성 찾기 </a> </li> <li> <a href="/learning/pageView/5264">외계생명체 찾기 </a> </li> </ul> <a data-toggle="collapse" role="tab" id="leftNav7" data-parent="#accordion" href="#leftNav7_drop" aria-expanded="true" aria-controls="leftNav7_drop"> 별자리 </a> <ul id="leftNav7_drop" class="panel-collapse collapse" role="tabpanel" aria-labelledby="leftNav7"> <li> <a href="/learning/pageView/5058">별자리 기원 </a> </li> <li> <a href="/learning/pageView/5059">별자리 상식 </a> </li> <li> <a href="/learning/pageView/5267">북반구의 별자리 </a> </li> <li> <a href="/learning/pageView/5272">별자리 전설 </a> </li> <li> <a href="/learning/pageView/5324">별자리 구성 </a> </li> <li> <a href="/learning/pageView/5376">동양의 별자리 </a> </li> </ul> <a data-toggle="collapse" role="tab" id="leftNav8" data-parent="#accordion" href="#leftNav8_drop" aria-expanded="true" aria-controls="leftNav8_drop"> 망원경 </a> <ul id="leftNav8_drop" class="panel-collapse collapse" role="tabpanel" aria-labelledby="leftNav8"> <li> <a href="/learning/pageView/5064">역사 </a> </li> <li> <a href="/learning/pageView/5387">원리 </a> </li> <li> <a href="/learning/pageView/5390">종류 </a> </li> <li> <a href="/learning/pageView/5394">가대 </a> </li> <li> <a href="/learning/pageView/5396">활용 </a> </li> <li> <a href="/learning/pageView/5069">선택방법 </a> </li> <li> <a href="/learning/pageView/5402">관련부품 </a> </li> <li> <a href="/learning/pageView/6388">국내천문대 </a> </li> <li> <a href="/learning/pageView/6394">세계의 망원경 </a> </li> <li> <a href="/learning/pageView/5384">고천문의기 </a> </li> </ul> <a data-toggle="collapse" role="tab" id="leftNav9" data-parent="#accordion" href="#leftNav9_drop" aria-expanded="true" aria-controls="leftNav9_drop"> 천문우주 동영상 </a> <ul id="leftNav9_drop" class="panel-collapse collapse" role="tabpanel" aria-labelledby="leftNav9"> <li> <a href="/learning/post/educationVideo">천문우주 교육동영상 </a> </li> <li> <a href="/learning/post/mediaGallery">별별우주동영상 </a> </li> </ul> <a role="tab" id="leftNav10" data-parent="#accordion" href="/learning/pageView/6384" aria-expanded="true" aria-controls="leftNav10_drop"> 천문학자 </a> <ul id="leftNav10_drop" class="panel-collapse collapse" role="tabpanel" aria-labelledby="leftNav10"> </ul> <a data-toggle="collapse" role="tab" id="leftNav11" data-parent="#accordion" href="#leftNav11_drop" aria-expanded="true" aria-controls="leftNav11_drop"> 논문 </a> <ul id="leftNav11_drop" class="panel-collapse collapse" role="tabpanel" aria-labelledby="leftNav11"> <li> <a href="/learning/pageView/1623">한국천문학회지 </a> </li> <li> <a href="/learning/pageView/1628">한국우주과학회지 </a> </li> <li> <a href="/learning/pageView/6391">ADS 논문검색 </a> </li> </ul> </div> </div>  <div class="content_body_right" id="cont_skip"> <div class="box tab"> <ul class="cont w25"> <li class="active"><a href="/learning/pageView/5175">유성</a></li> <li ><a href="/learning/pageView/5176">유성우</a></li> <li ><a href="/learning/pageView/5177">운석</a></li> </ul> </div> <div class="content_wrap"> <h5>유성</h5> <div>유성이란 흔히 말하는 별똥별을 뜻한다. 이 유성은 혜성, 소행성에서 떨어져 나온 티끌, 또는 태양계를 떠돌던 먼지 등이 지구 중력에 이끌려 대기 안으로 들어오면서 대기와의 마찰로 불타는 현상을 말한다. 하루 동안 지구 전체에 떨어지는 유성 가운데 맨눈으로 볼 수 있는 것은 수없이 많으며, 유성이 빛을 발하는 시간은 1/수십 초에서 수 초 사이이다.</div> <h6>유성체</h6> <div class="lea_img w_310" style="height: 160px;"><img src="/file/astro_page/496038177103040.jpg" width="400" alt="유성 이미지"></div> <div>유성체란 행성 사이의 우주 공간을 떠돌아다니는 소행성보다 많이 작고, 원자나 분자보다는 훨씬 큰 천체를 말한다. 하지만 커다란 유성체는 작은 소행성크기 정도로 둘을 구분하는 명확한 경계는 없다. 혜성에 기원을 둔 유성체의 밀도는 약 0.3g/cm³이나, 쌍둥이자리유성우처럼 소행성에 기원을 둔 것으로 생각되는 유성우의 유성체 밀도는 약 2g/cm³로 높다. 유성체 자체가 밀도가 높아 단단하면 다른 유성들에 비해 긴 흔적을 남긴다. 유성체는 보통 약 100km 상공(지구 상층대기)에서 빛을 내기 시작하며, 그 속도는 11km/s에서 72km/s에 이르기까지 큰 폭을 갖는다. 유성체는 크기가 작지만 운동 에너지는 대단히 커서 대기 분자들과 충돌하면서 금방 타버리며, 크기가 클수록 밝고 상대적으로 오래보이며, 작은 크기면 약하게 잠깐 빛을 내기도 한다.</div></div> <div id="upDateinfo" class="upDateinfo"> <span class="division_blue">최종수정일</span> <p class="date"> 2020년 11월 13일 </p> </div> </div> </div> </section>   <footer class="footer"> <div class="link"> <div class="grab"> <a class="fir" href="https://www.kasi.re.kr/kor/post/privacy" target="_blank">개인정보처리방침</a> <a href="/pageView/36">저작권정책</a> <button type="button" data-toggle="modal" id="prtcipSiteBtn" data-target="#familySiteModal"> 관련사이트 <img src="/resources/images/common/footer_ico_modal.png" alt="" class="ico_modal"> <img src="/resources/images/common/footer_ico_modal_w.png" alt="" class="ico_w_modal"> </button> <div class="clearfix"></div> </div> </div> <div class="grab"> <address class="address">(34055) 대전광역시 유성구 대덕대로 776     전화: 080-373-3333(무료) / 042-865-3333(유료)     천문정보 ARS: 042-865-3332     팩스: 042-861-5610</address> <p class="copyright">Copyright (C) 2017 Korea Astronomy and Space Science Institute. 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