{"id":139,"date":"2020-06-27T18:58:17","date_gmt":"2020-06-27T09:58:17","guid":{"rendered":"http:\/\/stevenoh0908.kro.kr\/blog\/?p=139"},"modified":"2023-04-02T19:21:43","modified_gmt":"2023-04-02T10:21:43","slug":"%ec%a7%80%ec%a0%81%ec%97%ac%ec%a0%95-3-%eb%a2%b0%eb%a8%b8%ec%99%80-%eb%b9%9b-%ea%b4%91%ec%86%8d-%ec%b8%a1%ec%a0%95-%ec%8b%a4%ed%97%98","status":"publish","type":"post","link":"https:\/\/stevenoh0908.pe.kr\/blog\/knowledges\/%ec%a7%80%ec%a0%81%ec%97%ac%ec%a0%95-3-%eb%a2%b0%eb%a8%b8%ec%99%80-%eb%b9%9b-%ea%b4%91%ec%86%8d-%ec%b8%a1%ec%a0%95-%ec%8b%a4%ed%97%98\/","title":{"rendered":"\uc9c0\uc801\uc5ec\uc815 #3. \ub8b0\uba38\uc640 \ube5b, \uad11\uc18d \uce21\uc815 \uc2e4\ud5d8"},"content":{"rendered":"\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">\u2018\uc9c0\uc801\uc5ec\uc815\u2019 \uc2dc\ub9ac\uc988\ub294 \ud544\uc790\uac00 \uace0\ub4f1\ud559\uad50 \uc218\uc5c5 \uc2dc\uac04\uc5d0 \ub5a0\uc62c\ub9b0 \uc758\ubb38\uc810 \ub4f1\uc5d0 \ub300\ud558\uc5ec \uc790\uccb4\uc801\uc778 \uc790\ub8cc \uc870\uc0ac\ub97c \ud1b5\ud558\uc5ec \uadf8 \ub2f5\uc744 \ucc3e\uace0, \uae30\ub85d\ud574\ub450\uae30 \uc704\ud574 \uae30\ud68d\ub418\uc5c8\uc2b5\ub2c8\ub2e4.<\/p>\n<\/blockquote>\n\n\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_88 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/stevenoh0908.pe.kr\/blog\/knowledges\/%ec%a7%80%ec%a0%81%ec%97%ac%ec%a0%95-3-%eb%a2%b0%eb%a8%b8%ec%99%80-%eb%b9%9b-%ea%b4%91%ec%86%8d-%ec%b8%a1%ec%a0%95-%ec%8b%a4%ed%97%98\/#%EC%A7%88%EB%AC%B8\" >\uc9c8\ubb38<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/stevenoh0908.pe.kr\/blog\/knowledges\/%ec%a7%80%ec%a0%81%ec%97%ac%ec%a0%95-3-%eb%a2%b0%eb%a8%b8%ec%99%80-%eb%b9%9b-%ea%b4%91%ec%86%8d-%ec%b8%a1%ec%a0%95-%ec%8b%a4%ed%97%98\/#%EB%8C%80%EB%8B%B5\" >\ub300\ub2f5<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/stevenoh0908.pe.kr\/blog\/knowledges\/%ec%a7%80%ec%a0%81%ec%97%ac%ec%a0%95-3-%eb%a2%b0%eb%a8%b8%ec%99%80-%eb%b9%9b-%ea%b4%91%ec%86%8d-%ec%b8%a1%ec%a0%95-%ec%8b%a4%ed%97%98\/#%EA%B5%AC%EC%B2%B4%EC%A0%81%EC%9D%B8_%EB%B0%A9%EB%B2%95_%E2%80%93_CLEA_Jupiter_Moons_Speed_of_Light\" >\uad6c\uccb4\uc801\uc778 \ubc29\ubc95 &#8211; CLEA Jupiter Moons &amp; Speed of Light<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/stevenoh0908.pe.kr\/blog\/knowledges\/%ec%a7%80%ec%a0%81%ec%97%ac%ec%a0%95-3-%eb%a2%b0%eb%a8%b8%ec%99%80-%eb%b9%9b-%ea%b4%91%ec%86%8d-%ec%b8%a1%ec%a0%95-%ec%8b%a4%ed%97%98\/#%EA%B2%B0%EB%A1%A0\" >\uacb0\ub860<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/stevenoh0908.pe.kr\/blog\/knowledges\/%ec%a7%80%ec%a0%81%ec%97%ac%ec%a0%95-3-%eb%a2%b0%eb%a8%b8%ec%99%80-%eb%b9%9b-%ea%b4%91%ec%86%8d-%ec%b8%a1%ec%a0%95-%ec%8b%a4%ed%97%98\/#%EC%B0%B8%EA%B3%A0_%EC%9E%90%EB%A3%8C\" >\ucc38\uace0 \uc790\ub8cc<\/a><\/li><\/ul><\/nav><\/div>\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%EC%A7%88%EB%AC%B8\"><\/span>\uc9c8\ubb38<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">\uc62c\ub808 \ub8b0\uba38\ub294 \uad6c\uccb4\uc801\uc73c\ub85c \uc5b4\ub5a4 \ubc29\uc2dd\uc73c\ub85c \uad11\uc18d\uc744 \uce21\uc815\ud558\uc600\ub294\uac00?<\/p>\n<cite>\uc815\ub300\uc218 \uc120\uc0dd\ub2d8. \uc77c\ubc18\ubb3c\ub9ac\ud559 \uc218\uc5c5 \uc911 \ub5a0\uc624\ub978 \uc9c8\ubb38.<\/cite><\/blockquote>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%EB%8C%80%EB%8B%B5\"><\/span>\ub300\ub2f5<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"> \ub374\ub9c8\ud06c\uc758 \ucc9c\ubb38\ud559\uc790\uc774\uc790, \ubc1c\uba85\uac00, \uc815\uce58\uac00\uc778 \uc62c\ub808 \ub8b0\uba38(Olaf Romer)\ub294 1675\ub144 \ubaa9\uc131\uc758 \uc704\uc131 \uc911 \ud558\ub098\uc778 \uc774\uc624\uc758 \uc2dd(\uc774\uc624\uac00 \ubaa9\uc131\uc758 \uadf8\ub9bc\uc790\uc5d0 \uc758\ud574 \uac00\ub824\uc9c0\ub294 \ud604\uc0c1)\uc5d0 \ub300\ud55c \uad00\uce21 \uc790\ub8cc\ub97c \uc774\uc6a9\ud558\uc5ec \ube5b\uc758 \uc18d\ub825\uc744 \ud604\ub300\uc758 \uce21\uc815\uac12\uacfc \ube44\uc2b7\ud558\uac8c \uce21\uc815\ud588\ub2e4.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img decoding=\"async\" src=\"https:\/\/upload.wikimedia.org\/wikipedia\/commons\/thumb\/c\/c0\/Illustration_from_1676_article_on_Ole_R%C3%B8mer%27s_measurement_of_the_speed_of_light.jpg\/220px-Illustration_from_1676_article_on_Ole_R%C3%B8mer%27s_measurement_of_the_speed_of_light.jpg\" alt=\"\"\/><figcaption class=\"wp-element-caption\">\ub8b0\uba38\uc758 \ube5b\uc758 \uc18d\ub825 \uce21\uc815(From Wikipedia)<\/figcaption><\/figure>\n<\/div>\n\n\n<p class=\"wp-block-paragraph\"> \ub8b0\uba38\ub294 \uc9c0\uad6c\uac00 \uacf5\uc804 \uada4\ub3c4 \uc0c1\uc5d0\uc11c \uac00\uae4c\uc774 \uc788\uc744 \ub54c(\ucda9 \ubd80\uadfc)\uac00 \uc9c0\uad6c\uac00 \uacf5\uc804 \uada4\ub3c4 \uc0c1\uc5d0\uc11c \uba40\ub9ac \uc788\uc744 \ub54c(\ud569 \ubd80\uadfc)\ubcf4\ub2e4 \uc57d 22\ubd84 \ube68\ub9ac \ub098\ud0c0\ub09c\ub2e4\ub294 \uac83\uc744 \uad00\uce21\ud588\ub2e4. \uc9c0\uad6c\uc5d0\uc11c \ubcf4\uc558\uc744 \ub54c, \uc774\uc624\uc758 \uc2dd\uacfc \uad00\ub828\ud55c 2\uac00\uc9c0 \uc0ac\uac74\uc774 \uc788\ub294\ub370, \uccab\uc9f8\ub294 \uc774\uc624\uac00 \uad00\ucc30\uc790\uc5d0\uac8c \ubcf4\uc774\ub2e4\uac00 \ubcf4\uc774\uc9c0 \uc54a\uc744 \ub54c, \uc989 \uc774\uc624\uac00 \ubaa9\uc131\uc758 \uadf8\ub9bc\uc790 \uc548\uc73c\ub85c \ub4e4\uc5b4\uac00\ub294 \uc0ac\uac74(immersion)\uc774\uba70, \ub458\uc9f8\ub294 \uc774\uc624\uac00 \uad00\ucc30\uc790\uc5d0\uac8c \ubcf4\uc774\uc9c0 \uc54a\ub2e4\uac00 \ubcf4\uc77c \ub54c, \uc989 \uc774\uc624\uac00 \ubaa9\uc131\uc758 \uadf8\ub9bc\uc790\uc5d0\uc11c \ub098\uc624\ub294 \uc0ac\uac74(emergence)\uc774 \ubc14\ub85c \uadf8\uac83\ub4e4\uc774\ub2e4.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"> \ub8b0\uba38\ub294 \ud569\uacfc \ucda9 \ubd80\uadfc\uc5d0\uc11c \uc77c\uc5b4\ub098\ub294 \uc774\uc624\uc758 \uc2dd \ud604\uc0c1\uc744 \uad00\ucc30\ud558\uc600\uc744 \ub54c, \uc774 \uc774\uc624\uc758 \uc2dd \ud604\uc0c1\uc774 \uad00\ucc30\ub418\ub294 \uc2dc\uac04\uaca9\uc774 \uc2e4\uc81c \uc774\uc624\uc758 \ubaa9\uc131\uc5d0 \ub300\ud55c \uacf5\uc804\uc8fc\uae30\uc5d0 \uc758\ud55c \uc774\ub860\uc801 \uacc4\uc0b0\uac12\ubcf4\ub2e4 \uc57d 22\ubd84 \uc815\ub3c4 \ud06c\ub2e4\ub294 \uac83\uc744 \uc54c\uc544\ucc28\ub838\ub2e4. \uadf8\ub294 \ube5b\uc774 \uc720\ud55c\ud55c \uc18d\ub825\uc73c\ub85c \uc774\ub3d9\ud55c\ub2e4\uace0 \uacb0\ub860\ub0b4\ub838\uace0, \ud569\uacfc \ucda9 \ubd80\uadfc\uc758 \uc9c0\uad6c-\ud589\uc131\uc758 \ubc30\uce58 \uad00\uacc4\ub97c \uace0\ub824\ud558\uc5ec \ube5b\uc774 \uc9c0\uad6c \uada4\ub3c4\uc758 \ud3c9\uade0 \uc9c0\ub984\uc744 \uac00\ub85c\uc9c0\ub974\ub294\ub370 \uc57d 22\ubd84\uc774 \uac78\ub838\ub2e4\uace0 \ucd94\ub860\ud588\ub2e4(\uc2e4\uc81c\ub85c\ub294 \uc57d 16\ubd84 36\ucd08). \ub8b0\uba38\ub294 \uc5ec\ub7ec \ubc88\uc758 \uc2dc\ud589\ucc29\uc624 \ub05d\uc5d0 \uad00\uce21 \uacb0\uacfc\ub97c \uc774\uc6a9\ud558\uc5ec, \ube5b\uc758 \uc18d\ub825\uc744 \uc57d 212,000 km\/s\ub85c \ucd94\uc0b0\ud558\uc600\ub2e4.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"> \ub8b0\uba38\uc758 \uce21\uc815\uac12\uc740 \uc624\ub298\ub0a0\uc758 \uce21\uc815\uac12\uc778 2.997925\u00d710<sup>8<\/sup> m\/s \uc640 \ube44\uad50\ud558\uc600\uc744 \ub54c \uc624\ucc28\uac00 26% \uc815\ub3c4\ub85c \uc0c1\ub2f9\ud558\ub098, \uadf8\uac00 \uc0b4\ub358 \ub2f9\uc2dc, \uc989 \ub274\ud134\uc774 \uc8fd\uc740 \uc774\ud6c4 \ucf00\ubc88\ub514\uc2dc\uc5d0 \uc758\ud55c \ube44\ud2c0\ub9bc\uc800\uc6b8 \uc2e4\ud5d8\uc774 \uc788\uae30 \uc804\uc5d0\ub294 \uc9c0\uad6c\uc758 \uc815\ud655\ud55c \uc9c8\ub7c9\uc744 \uacc4\uc0b0\ud558\uc9c0 \ubabb\ud55c \uc0c1\ud0dc\uc600\uc73c\ubbc0\ub85c, \uac01 \ud589\uc131\ub4e4\uc758 \uacf5\uc804\uada4\ub3c4\uac70\ub9ac\ub97c \uc815\ud655\ud788 \uc54c\uc9c0\ub294 \ubabb\ud588\ub2e4. \uc989, \ud0dc\uc591\uc5d0\uc11c \uc9c0\uad6c\ub098 \ubaa9\uc131\uae4c\uc9c0\uc758 \uac70\ub9ac\uac00 \uc815\ud655\ud558\uc9c0\ub294 \uc54a\uc558\ub358 \uac83\uc774\ub2e4. \ub8b0\uba38\uc758 \uc624\ucc28\ub294 \uc774\ub7ec\ud55c \uc2dc\ub300\uc801 \ubc30\uacbd\uc5d0\uc11c \ud0c4\uc0dd\ud55c \uac83\uc784\uc744 \uace0\ub824\ud574\uc57c \ud55c\ub2e4.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"> \ub8b0\uba38\ub294 \ube5b\uc758 \uc18d\ub825\uc774 \ubb34\ud55c\ud558\uc9c0 \uc54a\ub2e4\ub294 \uba85\ubc31\ud55c \uc99d\uac70\ub97c \uc81c\uacf5\ud558\uc600\uc73c\uba70, \ucd5c\ucd08\uc758 \uadfc\ub300\uc801\uc778 \ubc29\ubc95\uc73c\ub85c\uc11c\uc758 \ube5b\uc758 \uc18d\ub825\uc744 \uce21\uc815\ud558\uc600\ub2e4\ub294 \uc810\uc5d0\uc11c \uc758\uc758\uac00 \uc788\ub2e4.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%EA%B5%AC%EC%B2%B4%EC%A0%81%EC%9D%B8_%EB%B0%A9%EB%B2%95_%E2%80%93_CLEA_Jupiter_Moons_Speed_of_Light\"><\/span>\uad6c\uccb4\uc801\uc778 \ubc29\ubc95 &#8211; CLEA Jupiter Moons &amp; Speed of Light<span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\"> \ub8b0\uba38\uc758 \uad11\uc18d \uce21\uc815 \ubc29\ubc95\uc744 \uc9c1\uc811 \ud574\ubcf4\uace0 \uc2f6\uc5b4 \uad00\ub828 \ubc29\ubc95\uc744 \ucc3e\ub358 \uc911, Gettysburg \ub300\ud559\uad50 \ubb3c\ub9ac\ud559\ubd80\uc5d0\uc11c \uc81c\uacf5\ud558\ub294 Jupiter Moons &amp; Speed of Light \ud504\ub85c\uadf8\ub7a8\uc744 \uc0ac\uc6a9\ud558\uc5ec \ubaa8\uc758\uc801\uc73c\ub85c \uad11\uc18d \uce21\uc815 \uc2e4\ud5d8\uc744 \ud574 \ubcfc \uc218 \uc788\ub2e4\ub294 \uc0ac\uc2e4\uc744 \uc54c\uac8c \ub418\uc5b4 \ud504\ub85c\uadf8\ub7a8\uc744 \uc0ac\uc6a9\ud558\uc5ec \uc2e4\ud5d8\uc744 \ud574 \ubcf4\uc558\ub2e4.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"651\" src=\"http:\/\/stevenoh0908.pe.kr\/blog\/wp-content\/uploads\/2020\/08\/\ub8b0\uba38-\uad11\uc18d-\uce21\uc815-\uc2e4\ud5d8-\uc218\ud589-\uacfc\uc815-1-1024x651.png\" alt=\"\" class=\"wp-image-209\" srcset=\"https:\/\/stevenoh0908.pe.kr\/blog\/wp-content\/uploads\/2020\/08\/\ub8b0\uba38-\uad11\uc18d-\uce21\uc815-\uc2e4\ud5d8-\uc218\ud589-\uacfc\uc815-1-1024x651.png 1024w, https:\/\/stevenoh0908.pe.kr\/blog\/wp-content\/uploads\/2020\/08\/\ub8b0\uba38-\uad11\uc18d-\uce21\uc815-\uc2e4\ud5d8-\uc218\ud589-\uacfc\uc815-1-300x191.png 300w, https:\/\/stevenoh0908.pe.kr\/blog\/wp-content\/uploads\/2020\/08\/\ub8b0\uba38-\uad11\uc18d-\uce21\uc815-\uc2e4\ud5d8-\uc218\ud589-\uacfc\uc815-1-768x488.png 768w, https:\/\/stevenoh0908.pe.kr\/blog\/wp-content\/uploads\/2020\/08\/\ub8b0\uba38-\uad11\uc18d-\uce21\uc815-\uc2e4\ud5d8-\uc218\ud589-\uacfc\uc815-1-1536x977.png 1536w, https:\/\/stevenoh0908.pe.kr\/blog\/wp-content\/uploads\/2020\/08\/\ub8b0\uba38-\uad11\uc18d-\uce21\uc815-\uc2e4\ud5d8-\uc218\ud589-\uacfc\uc815-1.png 1601w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\">CELA Jupiter Moons &amp; Speed of Light \ud504\ub85c\uadf8\ub7a8\uc744 \uc0ac\uc6a9\ud55c \ub8b0\uba38\uc758 \uad11\uc18d \uce21\uc815 \ubaa8\uc758 \uc2e4\ud5d8<\/figcaption><\/figure>\n<\/div>\n\n\n<p class=\"wp-block-paragraph\"> \ud504\ub85c\uadf8\ub7a8\uc744 \uc0ac\uc6a9\ud558\uc5ec 2021-01-29\uc5d0 \uc77c\uc5b4\ub098\ub294 \ud569\uc758 \uc704\uce58(\uc9c0\uad6c-\ubaa9\uc131\uc758 \uac70\ub9ac\uac00 \ucd5c\ub300\uc774\ubbc0\ub85c, \uc9c0\uad6c-\uc774\uc624\uc758 \uac70\ub9ac\uac00 \ucd5c\ub300\uc77c \uac83\uc73c\ub85c \ucd94\uc0b0\ud560 \uc218 \uc788\uc74c)\uc640 2021-08-20\uc5d0 \uc77c\uc5b4\ub098\ub294 \ucda9\uc758 \uc704\uce58(\uc9c0\uad6c-\ubaa9\uc131\uc758 \uac70\ub9ac\uac00 \ucd5c\uc18c\uc774\ubbc0\ub85c, \uc9c0\uad6c-\uc774\uc624\uc758 \uac70\ub9ac\uac00 \ucd5c\uc18c\uc77c \uac83\uc73c\ub85c \ucd94\uc0b0\ud560 \uc218 \uc788\uc74c)\uc5d0 \uad00\ud55c \uc815\ubcf4\ub97c \uc774\uc6a9\ud55c \uacb0\uacfc, \uc2dc\ubbac\ub808\uc774\ud130\uc5d0\uc11c \ud569\uc758 \uc704\uce58\uc5d0\uc11c\ub294 2021-01-29 19:27:17(\ud55c\uad6d\ud45c\uc900\uc2dc, KTC)\uc5d0\uc11c \uc77c\uc5b4\ub0ac\uace0, \ucda9\uc758 \uc704\uce58\uc5d0\uc11c\ub294 2021-08-21 08:03:36(\ud55c\uad6d\ud45c\uc900\uc2dc, KTC)\uc5d0\uc11c \uc77c\uc5b4\ub0ac\uc74c\uc744 \ud655\uc778\ud560 \uc218 \uc788\uc5c8\ub2e4.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"> \uc774\uc624\uc758 \uacf5\uc804 \uc8fc\uae30\ub294 \ub300\ub7b5 1.7691\uc77c\uc774\ub2e4. \uc774\ub97c \uc774\uc6a9\ud558\uc5ec \ucda9\uc758 \uc704\uce58\uc5d0\uc11c\uc758 \uc774\uc624\uc758 \uc2dd \ud604\uc0c1\uc774 \uad00\ucc30\ub418\uc5b4\uc57c \ud560 \uc2dc\uac01\uc744 \uc608\uce21\ud558\uba74, \ud504\ub85c\uadf8\ub7a8\uc744 \ub3cc\ub838\uc744 \ub54c 2021-01-29\uc5d0 \uc77c\uc5b4\ub098\ub294 \uc2dd \ud604\uc0c1 \uc774\ud6c4\ub85c\ubd80\ud130 2021-08-20\uc5d0 \uc77c\uc5b4\ub098\ub294 \uc2dd \ud604\uc0c1\uae4c\uc9c0\ub294 \ucd1d 115\ubc88\uc758 \uc2dd \ud604\uc0c1\uc774 \uc77c\uc5b4\ub098\ub294 \uac83\uc744 \ud655\uc778\ud560 \uc218 \uc788\ub2e4. \uc989, \uc2dd \ud604\uc0c1\uc758 \ud69f\uc218\uac00 \uae30\uac04 \ub3cb\uc548 115\ubc88\uc73c\ub85c \uad00\ucc30\ub418\ubbc0\ub85c \uc0ac\uc2e4 2021-08-20\uc5d0 \uad00\uce21\ub418\ub294 \uc2dd \ud604\uc0c1\uc774 \uc77c\uc5b4\ub09c \uc815\ud655\ud55c \uc2dc\uac01\uc740 2021-01-29\uc5d0 \uc77c\uc5b4\ub09c \uc2dd \ud604\uc0c1 \uc774\ud6c4\ub85c, \uc57d $1.7691 \\times 115 = 203.534015 $\uc77c\uc774 \uc9c0\ub09c \ub4a4\ub77c\uace0 \ucd94\ub860\ud560 \uc218 \uc788\ub2e4.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"> \uc774\ub97c \uc774\uc6a9\ud558\uc5ec \uacc4\uc0b0\ud55c \ucda9 \ubd80\uadfc\uc5d0\uc11c \uc77c\uc5b4\ub098\ub294 \uc608\uce21\ub41c \uc774\uc624 \uc2dd \ud604\uc0c1\uc758 \uad00\uce21 \uc2dc\uac01\uc740 \uc904\ub9ac\uc548\ub825\uc73c\ub85c 2459447.469628 JD\uc774\uace0, \uad00\uce21\ub41c \ucda9 \ubd80\uadfc\uc758 \uc774\uc624 \uc2dd \ud604\uc0c1\uc758 \uad00\uce21 \uc2dc\uac01\uc740 \uc904\ub9ac\uc548\ub825\uc73c\ub85c 2459447.460833 JD\uc774\ub2e4.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"> \uc774 \ub54c \ubaa9\uc131\uc774 \ud569\uc758 \uc704\uce58\uc5d0 \uc788\uc744 \ub54c\uc640 \ucda9\uc758 \uc704\uce58\uc5d0 \uc788\uc744 \ub54c, \uc9c0\uad6c-\ubaa9\uc131 \uc0ac\uc774 \uac70\ub9ac\ucc28\ub97c \uacc4\uc0b0\ud558\uba74 \ub300\ub7b5\uc801\uc73c\ub85c $\\Delta d = 306,845,700 km$\uc774\ub2e4. \uc55e\uc11c \uc0b4\ud3b4\ubcf4\uc558\ub4ef\uc774 \uad00\uce21\ub41c \uc774\uc624 \uc2dd \ud604\uc0c1\uc758 \uad00\uce21 \uc2dc\uac01\uacfc \uc774\uc624\uc758 \uacf5\uc804 \uc8fc\uae30\ub85c\ubd80\ud130 \uacc4\uc0b0\ub41c \uc2dd \ud604\uc0c1\uc758 \uc2e4\uc81c \ubc1c\uc0dd \uc2dc\uac01 \uc0ac\uc774\uc758 \uc2dc\uac04\uaca9\uc740 $\\Delta t = 759.888 s$\uc774\ub2e4. \uc774\ub85c\ubd80\ud130, \uad11\uc18d\uc740 $c = {{\\Delta d} \\over {\\Delta t}} = 405,119.8 km\/s$\ub85c \uad6c\ud574\uc9c4\ub2e4.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"> \uc704 \uac12\uc740 \ub8b0\uba38\uac00 \uad6c\ud55c \uac12\uacfc\ub3c4 \uc880 \ub2e4\ub974\uace0, \ud604\uc7ac \uce21\uc815\ub41c \uac12\uacfc \uc624\ucc28\uac00 \uaf64 \ud06c\ub2e4. \ub2f9\uc2dc \ub8b0\uba38\uc758 \uad00\uce21\uc774 \ub9e4\uc6b0 \uc815\ubc00\ud558\uc600\uace0, \ub2f9\uc2dc \uc54c\ub824\uc838 \uc788\ub358 \ubaa9\uc131\uc758 \uada4\ub3c4\ub3c4 \uc5b4\ub290 \uc815\ub3c4 \uc815\ud655\ud588\uc74c\uc744 \uc0dd\uac01\ud574\ubcfc \uc218 \uc788\ub2e4.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%EA%B2%B0%EB%A1%A0\"><\/span>\uacb0\ub860<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>1. \ub8b0\uba38\ub294 \uc815\ud655\ud788 \uc5b4\ub5bb\uac8c \ube5b\uc758 \uc18d\ub825\uc744 \uce21\uc815\ud558\uc600\ub294\uac00?<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"> \uadf8\ub294 \ub2f9\uc2dc\uc5d0 \ud2f0\ucf54 \ube0c\ub77c\ud5e4 \ub4f1\uc758 \uad00\uce21 \uc790\ub8cc\ub97c \uc774\uc6a9\ud574 \ucd94\uc0b0\ud55c \ubaa9\uc131\uc758 \uacf5\uc804 \uada4\ub3c4 \ubc18\uacbd\uacfc, \ubaa9\uc131\uc758 \uc704\uc131\uc774\uc5c8\ub358 \uc774\uc624\uc758 \uacf5\uc804 \uc8fc\uae30\ub97c \uc774\uc6a9\ud574 \ubaa9\uc131\uc774 \ucda9\uacfc \ud569 \uadfc\ucc98 \uc704\uce58\uc5d0 \uc788\uc744 \ub54c \uc608\uce21\ud55c \uc2dd\uc758 \uc2dc\uac01\uacfc \uc2e4\uc81c \uad00\uce21 \uc2dc\uac01 \uc0ac\uc774\uc758 \uc2dc\uac04\ucc28\uac00 \ube5b\uc774 \uadf8 \uc0ac\uc774\uc758 \uac70\ub9ac\ub97c \uc774\ub3d9\ud558\ub294\ub370 \uac78\ub9ac\ub294 \uc2dc\uac04\uc77c \uac83\uc73c\ub85c \ucd94\uc0b0\ud558\uc5ec, \uc774 \uc2dc\uac04\ucc28\uc640 \ubaa9\uc131\uc774 \ucda9\uacfc \ud569 \uc704\uce58\uc5d0 \uc788\uc744 \ub54c\uc758 \uac70\ub9ac \ucc28\uc774\ub97c \uc774\uc6a9\ud574\uc11c \ube5b\uc758 \uc18d\ub825\uc744 \uacc4\uc0b0\ud558\uc600\ub2e4.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%EC%B0%B8%EA%B3%A0_%EC%9E%90%EB%A3%8C\"><\/span>\ucc38\uace0 \uc790\ub8cc<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\uc22d\uc2e4\ub300\ud559\uad50 \ubb3c\ub9ac\ud559\uacfc(Department of Physics) \uac15\uc758\uc790\ub8cc, &#8216;Speed of Light&#8217; &#8211; <a href=\"https:\/\/physics.ssu.ac.kr\/c\/document_library\/get_file?uuid=89837841-86db-468d-8088-1017022b1ba5&amp;groupId=96750\">https:\/\/physics.ssu.ac.kr\/c\/document_library\/get_file?uuid=89837841-86db-468d-8088-1017022b1ba5&amp;groupId=96750<\/a>, 2020-07-03 \ud655\uc778.<\/li>\n\n\n\n<li>\uc704\ud0a4\ubc31\uacfc, \uc6b0\ub9ac \ubaa8\ub450\uc758 \ubc31\uacfc\uc0ac\uc804, &#8216;\ub8b0\uba38\uc758 \ube5b\uc758 \uc18d\ub825 \uce21\uc815&#8217; &#8211; <a href=\"https:\/\/ko.wikipedia.org\/wiki\/%EB%A2%B0%EB%A8%B8%EC%9D%98_%EB%B9%9B%EC%9D%98_%EC%86%8D%EB%A0%A5_%EC%B8%A1%EC%A0%95\">https:\/\/ko.wikipedia.org\/wiki\/%EB%A2%B0%EB%A8%B8%EC%9D%98_%EB%B9%9B%EC%9D%98_%EC%86%8D%EB%A0%A5_%EC%B8%A1%EC%A0%95<\/a>, 2020-07-03 \ud655\uc778.<\/li>\n\n\n\n<li>\ub124\uc774\ubc84 \ube14\ub85c\uadf8 &#8216;\ubc24\uc740 \ucc9c \uac1c\uc758 \ub208\ubb3c(\ubca8\ub77c\ub8e8\uc2a4)&#8217;, &#8216;\uc81c196\uc7a5 \ub8b0\uba38\uc758 \uad11\uc18d\ub3c4 \uce21\uc815&#8217; &#8211; <a href=\"https:\/\/m.blog.naver.com\/PostView.nhn?blogId=njinka&amp;logNo=220155908967&amp;proxyReferer=https:%2F%2Fwww.google.com%2F\">https:\/\/m.blog.naver.com\/PostView.nhn?blogId=njinka&amp;logNo=220155908967&amp;proxyReferer=https:%2F%2Fwww.google.com%2F<\/a>, 2020-07-03 \ud655\uc778.<\/li>\n\n\n\n<li>Dept. of Physics, Gettysburg College, Project CLEA: Jupiter&#8217;s Moons and  The Speed of Light &#8211; <a href=\"http:\/\/www3.gettysburg.edu\/~marschal\/clea\/roemerlab.html\">http:\/\/www3.gettysburg.edu\/~marschal\/clea\/roemerlab.html<\/a>, 2020-07-03 \ud655\uc778.<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>\u2018\uc9c0\uc801\uc5ec\uc815\u2019 \uc2dc\ub9ac\uc988\ub294 \ud544\uc790\uac00 \uace0\ub4f1\ud559\uad50 \uc218\uc5c5 \uc2dc\uac04\uc5d0 \ub5a0\uc62c\ub9b0 \uc758\ubb38\uc810 \ub4f1\uc5d0 \ub300\ud558\uc5ec \uc790\uccb4\uc801\uc778 \uc790\ub8cc \uc870\uc0ac\ub97c \ud1b5\ud558\uc5ec \uadf8 \ub2f5\uc744 \ucc3e\uace0, \uae30\ub85d\ud574\ub450\uae30 \uc704\ud574 \uae30\ud68d\ub418\uc5c8\uc2b5\ub2c8\ub2e4. \uc9c8\ubb38 \uc62c\ub808 \ub8b0\uba38\ub294 \uad6c\uccb4\uc801\uc73c\ub85c \uc5b4\ub5a4 \ubc29\uc2dd\uc73c\ub85c \uad11\uc18d\uc744 \uce21\uc815\ud558\uc600\ub294\uac00? \uc815\ub300\uc218 \uc120\uc0dd\ub2d8. \uc77c\ubc18\ubb3c\ub9ac\ud559 \uc218\uc5c5 \uc911 \ub5a0\uc624\ub978 \uc9c8\ubb38. \ub300\ub2f5 \ub374\ub9c8\ud06c\uc758 \ucc9c\ubb38\ud559\uc790\uc774\uc790, \ubc1c\uba85\uac00, \uc815\uce58\uac00\uc778 \uc62c\ub808 \ub8b0\uba38(Olaf Romer)\ub294 1675\ub144 \ubaa9\uc131\uc758 \uc704\uc131 \uc911 \ud558\ub098\uc778 \uc774\uc624\uc758 \uc2dd(\uc774\uc624\uac00 \ubaa9\uc131\uc758 \uadf8\ub9bc\uc790\uc5d0 \uc758\ud574 \uac00\ub824\uc9c0\ub294 \ud604\uc0c1)\uc5d0 \ub300\ud55c \uad00\uce21 \uc790\ub8cc\ub97c \uc774\uc6a9\ud558\uc5ec \ube5b\uc758 \uc18d\ub825\uc744 \ud604\ub300\uc758 \uce21\uc815\uac12\uacfc \ube44\uc2b7\ud558\uac8c \uce21\uc815\ud588\ub2e4. <a class=\"read-more\" href=\"https:\/\/stevenoh0908.pe.kr\/blog\/knowledges\/%ec%a7%80%ec%a0%81%ec%97%ac%ec%a0%95-3-%eb%a2%b0%eb%a8%b8%ec%99%80-%eb%b9%9b-%ea%b4%91%ec%86%8d-%ec%b8%a1%ec%a0%95-%ec%8b%a4%ed%97%98\/\">[&#8230;]<\/a><\/p>\n","protected":false},"author":18,"featured_media":462,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_share_on_mastodon":"1","_share_on_mastodon_status":"%title%\r\n\r\n%excerpt%\r\n\r\n%permalink%"},"categories":[4],"tags":[],"series":[12],"class_list":["post-139","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-knowledges","series-12"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.1.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"\uc5d0\ub514\ud130 &#039;\ucc45\ubc8c\ub808&#039;\uc758 \ub8b0\uba38\uc758 \uad11\uc18d \uce21\uc815 \uc2e4\ud5d8\uc5d0 \uad00\ud55c \uc9c0\uc801\uc5ec\uc815.\" \/>\n\t<meta name=\"robots\" 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