외계행성 찾는 법 | 외계행성 찾기 | 우주탐사 | 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> 외계행성 찾는 법 | 외계행성 찾기 | 우주탐사 | 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/fontawesome.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 = '5262'; //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/main_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/main_logo.png" alt="KASI 천문우주지식정보" class="sub_logo mobile_logo"> <img src="/resources/images/main_logo.png" alt="KASI 천문우주지식정보" class="sub_logo mobile_logo_w"> </a></h1> <nav id="gnb"> <h2 class="sr-only">주메뉴</h2> <a href='#' class="mobile-nav-link"></a> </nav>  <div class="header_btn"> <a href="#" title="통합검색 바로가기" class="search" id="btnSearch"><i class="glyphicon glyphicon-search"><span class="sr-only">검색</span></i></a> <a href="#none" title="사이트맵 바로가기" class="sitemap" data-toggle="modal" data-target="#siteMapModal"><i class="glyphicon glyphicon-menu-hamburger"><span class="sr-only">사이트맵</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">2025</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">2025</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 data-toggle="collapse" role="tab" data-parent="#accordion" href="#depth2_09" aria-expanded="true" aria-controls="depth2_09"> 천문우주 동영상 </a> <div id="depth2_09" class="depth2 collapse" role="tabpanel" aria-labelledby="depth2_09"> <div class="depth3_list"><a href="/learning/post/educationVideo">천문우주 교육동영상</a></div> <div class="depth3_list"><a href="/learning/post/mediaGallery">별별우주동영상</a></div> </div> </div> </div> <div class="depth2_list"> <a href="/learning/pageView/6384">천문학자</a> </div> <div class="depth2_list"> <div class="depth3"> <a data-toggle="collapse" role="tab" data-parent="#accordion" href="#depth2_011" aria-expanded="true" aria-controls="depth2_011"> 논문 </a> <div id="depth2_011" class="depth2 collapse" role="tabpanel" aria-labelledby="depth2_011"> <div class="depth3_list"><a href="/learning/pageView/1623">한국천문학회지</a></div> <div class="depth3_list"><a href="/learning/pageView/1628">한국우주과학회지</a></div> <div class="depth3_list"><a href="/learning/pageView/6391">ADS 논문검색</a></div> </div> </div> </div> </div> </div> <div class="depth1"> <a data-toggle="collapse" class="collapsed" role="tab" data-parent="#accordion" href="#depth1_3" aria-expanded="true" aria-controls="depth1_3"> 천문기록관 </a> <div id="depth1_3" class="depth2 collapse" role="tabpanel" aria-labelledby="depth1_3"> <div class="depth2_list"> <a href="/almanac/pageView/26">역서별</a> </div> <div class="depth2_list"> <a href="/almanac/pageView/27">연도별</a> </div> <div class="depth2_list"> <a href="/almanac/pageView/24">천문 기록 검색</a> </div> </div> </div> <div class="depth1"> <a data-toggle="collapse" class="collapsed" role="tab" data-parent="#accordion" href="#depth1_4" aria-expanded="true" aria-controls="depth1_4"> 공공데이터 </a> <div id="depth1_4" class="depth2 collapse" role="tabpanel" aria-labelledby="depth1_4"> <div class="depth2_list"> <div class="depth3"> <a data-toggle="collapse" role="tab" data-parent="#accordion" href="#depth4_01" aria-expanded="true" aria-controls="depth4_01"> 은하중심 24시 </a> <div id="depth4_01" class="depth2 collapse" role="tabpanel" aria-labelledby="depth4_01"> <div class="depth3_list"><a href="/publicdata/pageView/6438">고밀도 연속관측 데이터</a></div> <div class="depth3_list"><a href="/publicdata/pageView/6439">KMTNet 데이터 받기</a></div> <div class="depth3_list"><a href="/publicdata/pageView/6440">데이터 가공사례</a></div> </div> </div> </div> <div class="depth2_list"> <div class="depth3"> <a data-toggle="collapse" role="tab" data-parent="#accordion" href="#depth4_02" aria-expanded="true" aria-controls="depth4_02"> 우리의 별 태양 </a> <div id="depth4_02" class="depth2 collapse" role="tabpanel" aria-labelledby="depth4_02"> <div class="depth3_list"><a href="/publicdata/pageView/6441">태양의 물리적 특징</a></div> <div class="depth3_list"><a href="/publicdata/pageView/6442">태양데이터</a></div> <div class="depth3_list"><a href="/publicdata/pageView/6443">데이터 활용하기</a></div> </div> 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</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">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">2025</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">2025</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" 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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/5262">외계행성 찾는 법</a></li> <li ><a href="/learning/pageView/5263">발견된 행성들</a></li> </ul> </div> <div class="content_wrap"> <h5>외계행성 찾는 법</h5> <div>외계행성을 찾는 작업은 1천억W의 서치라이트 옆에 있는 백W의 전구를 구별하는 것만큼 어렵다. 별과 별 주위를 도는 행성의 밝기 차이가 그 만큼 크기 때문이다. 그래서 외계행성의 발견은 거의 불가능한 것처럼 보인다. 그런데도 외계행성을 찾을 수 있는 방법이 있을까? <br> <br>별 주위에 행성이 있다면 별은 행성의 중력에 의해 약간 위치가 변하며, 또 별 주위를 도는 행성이 별을 가릴 경우에 별의 밝기가 조금 떨어진다. 이런 가정들로부터 별을 관측하면 행성이 있는지를 알아낼 수 있다. 이러한 외계행성을 찾는 방법은 다섯 가지로 요약해 볼 수 있다.</div> <div class="lea_img_m"><img src="/file/astro_page/496345844684154.jpg" width="400" alt="광도곡선을 활용한 외계행성 찾기"></div> <div><b>첫 번째</b>는 행성이 우연히 별 앞을 지날 때 별의 광도가 변화하는 것을 정밀 분석하는 방법이다. 밝기 변화가 일어났을 때 흑점이나 별 표면에서 일어나는 다른 현상에 의한 것이 아니라면 간접적이나마 행성이 있다고 말할 수 있다. 행성이 밝다면, 행성이 직접 별을 가리지 않더라도 행성의 위치에 따라 별과 행성을 합한 밝기가 변화하므로 행성의 존재를 유추해낼 수 있다. 즉 행성은 스스로 빛을 내지 못하고 별의 빛을 받아 빛나므로 행성이 별 주위를 돌면서 별빛을 가리면 어둡고, 별빛을 반사해 별빛에 광도를 더하면 밝아지는 광도 변화를 추적해 내는 것이다.</div> <div style="margin-top: 25px;"><b>두 번째</b>는 도플러 효과를 이용하는 방법이다. 질량이 큰 행성이 별 주위에 있으면 그 행성의 중력에 의해 미약하나마 별도 움직이게 된다. 따라서 스펙트럼을 측정해 보면 적색편이와 청색편이가 주기적으로 일어나게 된다. 행성의 질량이 클수록 별이 도는 현상은 뚜렷이 나타난다.</div> <div class="lea_img_m"><img src="/file/astro_page/496346125880501.jpg" width="400" alt="도플러 효과를 이용한 외계행성 찾기"></div> <div><b>세 번째</b>는 전파신호를 주기적으로 내는 천체인 펄사의 신호주기 변화를 측정하는 방법이다. 1967년 처음 발견된 펄사는 초신성의 폭발로 형성된 중성자별이 내는 전파인데, 중성자별이 빠르게 회전하면서 주기적인 전파를 방출하는 것이다. 펄사 주위에 행성이 돌고 있으면 펄사 신호의 주기가 변화하게 된다. 이 변화를 추론해 행성의 존재를 유추해 낼 수 있다.</div> <div style="margin-top: 25px;"><b>네 번째</b>는 중력렌즈에 의한 방법이다. 아인슈타인의 일반상대성 이론에 따르면 빛도 중력에 따라 경로가 휘어진다. 때문에 별빛이 행성의 중력에 의해 굽어져 별의 밝기가 변하면 이를 정밀 분석해 행성의 존재를 유추해낼 수 있다.</div> <div class="lea_img_m"><img src="/file/astro_page/496346774316661.jpg" width="400" alt="중력렌즈 현상"></div> <div><b>다섯 번째</b>는 별이 움직이는 경로를 추적하는 방법이다. 별이 일정한 방향으로 움직일 때 혼자 움직일 경우에는 직선 경로를 보이지만, 행성과 같이 갈 경우 경로가 꼬불꼬불한 경로를 그리게 된다. 이유는 별과 행성이 공동 무게 중심을 돌면서 행진하기 때문이다. 따라서 별의 경로를 정확히 측정하면 보이지 않는 행성의 존재를 알 수가 있다.</div></div> <div id="upDateinfo" class="upDateinfo"> <span class="division_blue">최종수정일</span> <p class="date"> 2017년 6월 19일 </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> <a href="https://www.kasi.re.kr/" target="_blank">한국천문연구원 홈페이지 바로가기</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 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