{"id":1040,"date":"2018-07-05T02:05:01","date_gmt":"2018-07-05T02:05:01","guid":{"rendered":"http:\/\/163.180.4.222\/lab\/?p=1040"},"modified":"2023-07-22T16:49:11","modified_gmt":"2023-07-22T07:49:11","slug":"%ec%95%84%ec%9d%b8%ec%8a%88%ed%83%80%ec%9d%b8-%ec%9d%bc%eb%b0%98%ec%83%81%eb%8c%80%ec%84%b1%ec%9d%b4%eb%a1%a0-%eb%98%90-%ed%95%98%eb%82%98%ec%9d%98-%ec%8b%9c%ed%97%98%eb%8c%80-%ed%86%b5%ea%b3%bc","status":"publish","type":"post","link":"https:\/\/biochemistry.khu.ac.kr\/lab\/?p=1040","title":{"rendered":"\uc544\uc778\uc288\ud0c0\uc778 \uc77c\ubc18\uc0c1\ub300\uc131\uc774\ub860, \ub610 \ud558\ub098\uc758 \uc2dc\ud5d8\ub300 \ud1b5\uacfc\ud558\ub2e4 &#038; \uc544\uc778\uc288\ud0c0\uc778 \uc774\ub860 \ub610 \uc99d\uba85&#8230;\ube45\ubc45 10\uc5b5\ub144 \ud6c4 &#8216;\uc2dc\uac04 \uc9c0\uc5f0&#8217; \ud3ec\ucc29"},"content":{"rendered":"<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>(<a href=\"http:\/\/www.yonhapnews.co.kr\/bulletin\/2018\/07\/04\/0200000000AKR20180704118400017.HTML?input=1195m\">\uc6d0\ubb38<\/a>)<\/p>\n<p>&nbsp;<\/p>\n<h6>\uad6d\uc81c\uacf5\ub3d9\uc5f0\uad6c\uc9c4 &#8220;\uc0bc\uc911\uc131\uacc4 \uad00\uce21 \ud1b5\ud574 \uc77c\ubc18\uc0c1\ub300\uc131\uc774\ub860 \ub4f1\uac00\uc6d0\ub9ac \ud655\uc778&#8221;<\/h6>\n<p>&nbsp;<\/p>\n<p>\uc544\uc778\uc288\ud0c0\uc778\uc758 \uc77c\ubc18\uc0c1\ub300\uc131\uc774\ub860(<span class=\"word_dic en\">general<\/span>\u00a0<span class=\"word_dic en\">theory<\/span>\u00a0<span class=\"word_dic en\">of<\/span>\u00a0<span class=\"word_dic en\">relativity<\/span>)\uc774 \ub610 \ud558\ub098\uc758 \uc5c4\uc815\ud55c \uc2dc\ud5d8\ub300\ub97c \ud1b5\uacfc\ud588\ub2e4.<\/p>\n<p>\ub124\ub35c\ub780\ub4dc \uc804\ud30c\ucc9c\ubb38\ud559\uc5f0\uad6c\uc18c \uc564 \uc544\uce58\ubcfc\ub4dc \ubc15\uc0ac\uac00 \uc774\ub044\ub294 \uad6d\uc81c\uacf5\ub3d9\uc5f0\uad6c\ud300\uc740 5\uc77c \uad6d\uc81c\ud559\uc220\uc9c0 &#8216;\ub124\uc774\ucc98'(<span class=\"word_dic en\">Nature<\/span>)\uc5d0\uc11c \uc9c0\uad6c\uc5d0\uc11c 4\ucc9c200\uad11\ub144 \ub5a8\uc5b4\uc9c4 \uacf3\uc5d0 \uc788\ub294 \uc911\uc131\uc790\ubcc4\uacfc \ubc31\uc0c9\uc65c\uc131 2\uac1c\ub85c \uc774\ub8e8\uc5b4\uc9c4 \uc0bc\uc911\uc131\uacc4\ub97c \uc815\ubc00 \uad00\uce21, \uc911\ub825\uc774 \uadf9\ub3c4\ub85c \ud070 \ucc9c\uccb4\ub4e4\uc758 \uc0c1\ud638\uc791\uc6a9 \uc18d\uc5d0\uc11c\ub3c4 \uc77c\ubc18\uc0c1\ub300\uc131\uc774\ub860\uc774 \uc815\ud655\ud788 \uc791\ub3d9\ud55c\ub2e4\ub294 \uc0ac\uc2e4\uc744 \ud655\uc778\ud588\ub2e4\uace0 \ubc1d\ud614\ub2e4.<\/p>\n<p><span class=\"end_photo_org\"><img decoding=\"async\" src=\"https:\/\/imgnews.pstatic.net\/image\/001\/2018\/07\/05\/AKR20180704118400017_01_i_20180705020104682.jpg?type=w647\" \/><\/span><\/p>\n<p><span class=\"end_photo_org\"><em class=\"img_desc\">\uc77c\ubc18\uc0c1\ub300\uc131\uc6d0\ub9ac \uac80\uc99d\uc5d0 \uc774\uc6a9\ub41c \uc0bc\uc911\uc131\uacc4 \uc0c1\uc0c1\ub3c4\uc9c0\uad6c\uc5d0\uc11c 4\ucc9c200\uad11\ub144 \ub5a8\uc5b4\uc9c4 \uacf3\uc5d0 \uc788\ub294 \uc0bc\uc911\uc131\uacc4(<span class=\"word_dic en\">PSR<\/span>\u00a0J0337+1715). \uc624\ub978\ucabd \ud478\ub978 \ube5b\uc744 \ub0b4\ub294 \ucc9c\uccb4\uac00 \uc911\uc131\uc790\ubcc4, \uc67c\ucabd\uc758 \ud070 \ud770\uc0c9 \ucc9c\uccb4\uac00 \uc911\uc131\uc790\ubcc4 \uc8fc\uc704\ub97c 1.6\uc77c\uc5d0 \ud55c \ubc14\ud034\uc529 \ub3cc\uace0 \uc788\ub294 \ubc31\uc0c9\uc65c\uc131, \ubc31\uc0c9\uc65c\uc131 \uc624\ub978\ucabd \uc704\uc758 \uc791\uc740 \ubcc4\uc774 \ubc14\uae65 \uba40\ub9ac\uc5d0\uc11c \uc548\ucabd\uc758 \uc911\uc131\uc790\ubcc4\uacfc \ubc31\uc0c9\uc65c\uc131\uc744 327\uc77c\uc5d0 \ud55c \ubc14\ud034\uc529 \ub3cc\uace0 \uc788\ub294 \ubc14\uae65\ucabd \ubc31\uc0c9\uc65c\uc131. [<span class=\"word_dic en\">NRAO<\/span>\/<span class=\"word_dic en\">AUI<\/span>\/<span class=\"word_dic en\">NSF<\/span>\u00a0\uc81c\uacf5=\uc5f0\ud569\ub274\uc2a4]<\/em><\/span><\/p>\n<p>&nbsp;<\/p>\n<p>\ub124\uc774\ucc98\ub294 \uc774 \uacb0\uacfc\uc5d0 \ub300\ud574 &#8220;\ubaa8\ub4e0 \ubb3c\uccb4\ub294 \uc790\uccb4 \uc911\ub825\uacfc \uad00\uacc4\uc5c6\uc774 \uadf9\ud55c\uc758 \uc911\ub825\uc7a5 \uc18d\uc5d0\uc11c \ub099\ud558\ud560 \ub54c \ub3d9\uc77c\ud55c \uac00\uc18d\ub3c4\ub97c \uac16\ub294\ub2e4\ub294 \uc77c\ubc18\uc0c1\ub300\uc131\uc774\ub860\uc758 \ub4f1\uac00\uc6d0\ub9ac(<span class=\"word_dic en\">equivalence<\/span>\u00a0<span class=\"word_dic en\">principle<\/span>)\uac00 \uc9c0\uae08\uae4c\uc9c0 \ud589\ud574\uc9c4 \uac83 \uc911 \uac00\uc7a5 \uc5c4\uc911\ud55c \ud14c\uc2a4\ud2b8\ub97c \ud1b5\uacfc\ud588\ub2e4&#8221;\uace0 \uc804\ud588\ub2e4.<\/p>\n<p>\uc77c\ubc18\uc0c1\ub300\uc131\uc774\ub860\uc758 \ub4f1\uac00\uc6d0\ub9ac\ub294 \ud53c\uc0ac\uc758 \uc0ac\ud0d1\uc5d0\uc11c \ud3ec\ud0c4\uacfc \uc0ac\uacfc\ub97c \ub5a8\uc5b4\ub728\ub9ac\uba74 \ub3d9\uc2dc\uc5d0 \ub545\uc5d0 \ub5a8\uc5b4\uc9c0\ub294 \uac83\ucc98\ub7fc \ubaa8\ub4e0 \ub099\ud558\ud558\ub294 \ubb3c\uccb4\ub294 \uc790\uccb4 \uc9c8\ub7c9\uc774\ub098 \uad6c\uc131, \uc678\ubd80 \uc911\ub825\uc758 \uc601\ud5a5 \ub4f1\uacfc \uad00\uacc4\uc5c6\uc774 \ub611\uac19\uc774 \uac00\uc18d\ub3c4\ub97c \ubc1b\ub294\ub2e4\uace0 \uc124\uba85\ud55c\ub2e4.<\/p>\n<p>\ud559\uacc4\uc5d0\uc11c\ub294 \uc774 \uc6d0\ub9ac\uac00 \ub300\ubd80\ubd84 \uc131\ub9bd\ud55c\ub2e4\uace0 \ubcf4\uace0 \uc788\uc9c0\ub9cc \uc77c\ubd80\uc5d0\uc11c\ub294 \uc911\ub825\uc774 \uadf9\ub3c4\ub85c \ud070 \uadf9\ud55c \uc911\ub825\uc7a5 \uc18d\uc5d0\uc11c\ub294 \uc77c\ubc18\uc0c1\ub300\uc131\uc774\ub860\uacfc \ub2e4\ub978 \uc911\ub825\uc774\ub860\uc774 \uc791\ub3d9\ud560 \uc218 \uc788\ub2e4\ub294 \uac00\uc124\ub4e4\ub3c4 \uc81c\uae30\ud574 \uc654\ub2e4.<\/p>\n<p>\uc5f0\uad6c\uc9c4\uc740 2011\ub144 \ubc1c\uacac\ud55c \uc9c0\uad6c\uc5d0\uc11c 4\ucc9c200\uad11\ub144 \ub5a8\uc5b4\uc9c4 \uacf3\uc5d0 \uc788\ub294 \uc0bc\uc911\uc131\uacc4(<span class=\"word_dic en\">PSR<\/span>\u00a0J0337+1715)\ub97c 6\ub144\uc5ec\uc5d0 \uac78\uccd0 \uc815\ubc00 \uad00\uce21\ud574 \uadf9\ud55c \uc911\ub825\uc7a5 \uc18d\uc5d0\uc11c\ub3c4 \uc77c\ubc18\uc0c1\ub300\uc131\uc774\ub860\uc774 \uc815\ud655\ud788 \uc801\uc6a9\ub41c\ub2e4\ub294 \uacb0\uacfc\ub97c \uc5bb\uc5c8\ub2e4.<\/p>\n<p><span class=\"end_photo_org\"><img decoding=\"async\" src=\"https:\/\/imgnews.pstatic.net\/image\/001\/2018\/07\/05\/AKR20180704118400017_02_i_20180705020104691.jpg?type=w647\" \/><\/span><\/p>\n<p><span class=\"end_photo_org\"><em class=\"img_desc\">\uc0bc\uc911\uc131\uacc4\u00a0<span class=\"word_dic en\">PSR<\/span>\u00a0J0337+1715\uc758 \uada4\ub3c4 [\ub124\uc774\ucc98 \ub17c\ubb38 \ucea1\ucc98=\uc5f0\ud569\ub274\uc2a4]<\/em><\/span><\/p>\n<p>&nbsp;<\/p>\n<p>\uc774 \uc0bc\uc911\uc131\uacc4\ub294 \uc911\uc2ec\uc5d0 \ucd08\ub2f9 366\ud68c\uc529 \ud68c\uc804\ud558\ub294 \uc911\uc131\uc790\ubcc4\uc774 \uc788\uace0 \uadf8 \uc8fc\uc704\ub97c \ubc31\uc0c9\uc65c\uc131\uc774 1.6\uc77c\uc5d0 \ud55c \ubc14\ud034\uc529 \ub3cc\uace0 \uc788\ub2e4. \ubc14\uae65\ucabd \uba3c \uacf3\uc5d0\uc11c\ub294 \ub610 \ud558\ub098\uc758 \ubc31\uc0c9\uc65c\uc131\uc774 \uac00\uc6b4\ub370\uc758 \ub450 \ubcc4\uc744 327\uc77c\uc5d0 \ud55c \ubc14\ud034\uc529 \ud68c\uc804\ud558\uace0 \uc788\ub2e4.<\/p>\n<p>\ubc31\uc0c9\uc65c\uc131\uc740 \ud06c\uae30\ub294 \uc9c0\uad6c\uc640 \ube44\uc2b7\ud558\uc9c0\ub9cc \ubc00\ub3c4\uac00 \ub9e4\uc6b0 \ucee4 \uc9c8\ub7c9\uc740 \uc6b0\ub9ac \ud0dc\uc591\uacfc \ub9de\uba39\ub294\ub2e4. \uc911\uc131\uc790\ubcc4\uc740 \ud06c\uae30\ub294 \ubc31\uc0c9\uc65c\uc131\ubcf4\ub2e4 \uc791\uc9c0\ub9cc \ubc00\ub3c4\ub294 \ud6e8\uc52c \ucee4 \uc911\ub825\ub3c4 \ub9e4\uc6b0 \ud06c\ub2e4. \uc774\ub7f0 \ubcc4\ub4e4\uc740 \ubcc4\uc774 \uc0dd\uba85\uc744 \ub9c8\uce60 \ub54c \ucd08\uc2e0\uc131\ud3ed\ubc1c\uc744 \uc77c\uc73c\ud0a4\uba74\uc11c \uc911\uc2ec\ud575\uc774 \ubd95\uad34\ud574 \ub9cc\ub4e4\uc5b4\uc9c4\ub2e4.<\/p>\n<p>\uc5f0\uad6c\uc9c4\uc740 6\ub144\uc5ec \ub3d9\uc548 \ub124\ub35c\ub780\ub4dc \uc6e8\uc2a4\ud130\ubcf4\ud06c \ud569\uc131 \uc804\ud30c\ub9dd\uc6d0\uacbd, \uc6e8\uc2a4\ud2b8\ubc84\uc9c0\ub2c8\uc544\uc758 \uadf8\ub9b0 \ubc45\ud06c \ub9dd\uc6d0\uacbd, \ud478\uc5d0\ub974\ud1a0\ub9ac\ucf54\uc758 \uc544\ub808\uc2dc\ubcf4 \uc804\ud30c\ub9dd\uc6d0\uacbd\uc73c\ub85c \uac01\uac01 \ub9e4\uc6b0 \ud070 \uc911\ub825\uc744 \uac00\uc9c4 \uc911\uc131\uc790\ubcc4\uacfc \uc548\ucabd\uacfc \ubc14\uae65\ucabd \ubc31\uc0c9\uc65c\uc131\uc774 \uc11c\ub85c \uc5b4\ub5bb\uac8c \uc601\ud5a5\uc744 \ubbf8\uce58\ub294\uc9c0 \uad00\uce21, \uadf9\ud55c \uc911\ub825\uc7a5 \uc18d\uc5d0\uc11c\ub3c4 \uc77c\ubc18\uc0c1\ub300\uc131\uc774\ub860\uc774 \uc791\ub3d9\ud558\ub294\uc9c0 \uac80\uc99d\ud588\ub2e4.<\/p>\n<p>\uadf8 \uacb0\uacfc \ubc14\uae65\ucabd \ubc31\uc0c9\uc65c\uc131\uc774 \uc548\ucabd\uc758 \uc911\uc131\uc790\ubcc4\uacfc \ubc31\uc0c9\uc65c\uc131\uc5d0 \ubbf8\uce58\ub294 \uc911\ub825\uc758 \uc601\ud5a5 \ucc28\uc774\uac00 \ucd5c\ub300 260\ub9cc\ubd84\uc758 1 \uc774\ud558\ub85c \uac70\uc758 \ucc28\uc774\uac00 \uc5c6\uc74c\uc744 \ud655\uc778\ud588\ub2e4.<\/p>\n<p>\ub124\uc774\ucc98\ub294 \uc774 \uacb0\uacfc\ub294 \uc774\uc804\uc5d0 \uc218\ud589\ub41c \ub4f1\uac00\uc6d0\ub9ac \uac80\uc99d\uc744 1\ucc9c\ubc30 \uc815\ub3c4 \ud5a5\uc0c1\ud568\uc73c\ub85c\uc368 \uc544\uc778\uc288\ud0c0\uc778\uc758 \uc77c\ubc18\uc0c1\ub300\uc131 \uc774\ub860\uc774 \uc633\ub2e4\ub294 \uac83\uc744 \ub4b7\ubc1b\uce68\ud558\uace0 \uc788\ub2e4\uace0 \uc124\uba85\ud588\ub2e4.<\/p>\n<h6>\ub0a8\uc21c\uac74 \uacbd\ud76c\ub300 \ubb3c\ub9ac\ud559\uacfc \uad50\uc218\ub294 &#8220;\uadf9\ud55c\uc801\uc778 \uc911\ub825 \ud658\uacbd\uc5d0\uc11c\ub3c4 \uc77c\ubc18\uc0c1\ub300\uc131\uc774\ub860\uc758 \ub4f1\uac00\uc6d0\ub9ac\uac00 \ud655\uace0\ud558\uac8c \uac80\uc99d\ub410\ub2e4\ub294 \ub370 \uc758\ubbf8\uac00 \uc788\ub2e4&#8221;\uba70 &#8220;\uc77c\ubc18\uc0c1\ub300\uc131\uc774\ub860\uc774 \ube45\ubc45\uc774\ub098 \ube14\ub799\ud640 \uac19\uc740 \ub354 \uadf9\ud55c\uc801\uc778 \uc0c1\ud669\uc5d0\uc11c\ub294 \uae68\uc9c0\ub294 \uacbd\uc6b0\uac00 \ub098\uc624\uaca0\uc9c0\ub9cc \uc774\ubc88 \uc5f0\uad6c\ub85c \uc774 \uc774\ub860\uc5d0 \ub300\ud55c \ubbff\uc74c\uc740 \ub354 \ucee4\uc9c0\uac8c \ub410\ub2e4&#8221;\uace0 \ub9d0\ud588\ub2e4.<\/h6>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<h1 class=\"article-item__title serif\">General relativity verified by a triple-star system<\/h1>\n<p>&nbsp;<\/p>\n<p>(\uc6d0\ubb38: <a href=\"https:\/\/www.nature.com\/articles\/d41586-018-05549-4?utm_source=feedburner&amp;utm_medium=feed&amp;utm_campaign=Feed%3A+nature%2Frss%2Fcurrent+%28Nature+-+Issue%29\">\uc5ec\uae30<\/a>\ub97c \ud074\ub9ad\ud558\uc138\uc694~)<\/p>\n<p>&nbsp;<\/p>\n<p>Einstein\u2019s theory of gravity \u2014 the general theory of relativity \u2014 is based on the principle that all objects accelerate identically in an external gravitational field. A triple-star system provides a stringent test of this principle.<\/p>\n<p>&nbsp;<\/p>\n<div class=\"article__aside align-right hide-print\">\n<div class=\"pdf__download shrink--aside\"><\/div>\n<\/div>\n<div class=\"align-left\">\n<p class=\"article__body serif cleared\">All bodies in a given gravitational field are thought to fall with the same acceleration. This idea, known as the equivalence principle, is central to our understanding of gravitational physics. It was promoted by thinkers ranging from the sixth-century scholar John Philoponus to Galileo; it is the founding principle of Albert Einstein\u2019s general theory of relativity, and was famously demonstrated when Apollo astronaut David Scott dropped a hammer and a feather on the Moon and saw that they hit the lunar surface at the same time. For decades, experimentalists have verified the equivalence principle using exquisitely delicate instruments. Now,\u00a0<a href=\"https:\/\/www.nature.com\/articles\/s41586-018-0265-1\" data-track=\"click\" data-label=\"https:\/\/www.nature.com\/articles\/s41586-018-0265-1\" data-track-category=\"body text link\">in a paper in\u00a0<i>Nature<\/i><\/a>, Archibald\u00a0<i>et al.<\/i><sup><a href=\"https:\/\/www.nature.com\/articles\/d41586-018-05549-4?utm_source=feedburner&amp;utm_medium=feed&amp;utm_campaign=Feed%3A+nature%2Frss%2Fcurrent+%28Nature+-+Issue%29#ref-CR1\">1<\/a><\/sup>\u00a0report the results of a remarkable test of the principle, in which the falling objects are two stellar remnants: a neutron star and a white dwarf.<\/p>\n<aside data-label=\"Related\"><\/aside>\n<aside data-label=\"Related\">A spinning neutron star that emits a beam of electromagnetic radiation is known as a pulsar. The emission seems to pulse because it can be seen only when the beam is pointing towards Earth. The pulses are so regular that variations in their observed period can be readily interpreted as being due to the gravitational tug of another astronomical body on the pulsar. Such variations have been used to discover more than 220 binary systems containing a neutron star, and a handful of pulsars that have associated planets (<a href=\"http:\/\/go.nature.com\/2mslfj4\" data-track=\"click\" data-label=\"http:\/\/go.nature.com\/2mslfj4\" data-track-category=\"body text link\">go.nature.com\/2mslfj4<\/a>).<\/aside>\n<p class=\"article__body serif cleared\">In 2014, astronomers reported a pulsar that is unusual because it has two stellar companions<sup><a href=\"https:\/\/www.nature.com\/articles\/d41586-018-05549-4?utm_source=feedburner&amp;utm_medium=feed&amp;utm_campaign=Feed%3A+nature%2Frss%2Fcurrent+%28Nature+-+Issue%29#ref-CR2\">2<\/a><\/sup>\u00a0(Fig. 1). The neutron star, weighing 1.4 solar masses, is in a close 1.6-day orbit with a 0.2-solar-mass white dwarf. This pair of objects is itself in a 327-day orbit with a 0.4-solar-mass white dwarf. The inner and outer orbits are nearly circular and exist in almost exactly the same plane.<\/p>\n<p>&nbsp;<\/p>\n<figure class=\"figure\">\n<div class=\"embed intensity--high\">\n<div class=\"embed intensity--high\"><img decoding=\"async\" class=\"figure__image\" src=\"https:\/\/media.nature.com\/w800\/magazine-assets\/d41586-018-05549-4\/d41586-018-05549-4_15894602.jpg\" alt=\"\" \/><\/div>\n<\/div><figcaption>\n<p class=\"figure__caption sans-serif\"><span class=\"mr10\"><b>Figure 1 | Triple-star system.<\/b>\u00a0In 2014, astronomers reported a system that contains three stellar remnants: a neutron star and two white dwarfs<sup><a href=\"https:\/\/www.nature.com\/articles\/d41586-018-05549-4?utm_source=feedburner&amp;utm_medium=feed&amp;utm_campaign=Feed%3A+nature%2Frss%2Fcurrent+%28Nature+-+Issue%29#ref-CR2\">2<\/a><\/sup>.\u00a0<b>a<\/b>, The neutron star is in a close 1.6-day orbit with one of the white dwarfs.\u00a0<b>b<\/b>, This pair of objects is itself in a 327-day orbit with the other white dwarf. Archibald\u00a0<i>et al.<\/i><sup><a href=\"https:\/\/www.nature.com\/articles\/d41586-018-05549-4?utm_source=feedburner&amp;utm_medium=feed&amp;utm_campaign=Feed%3A+nature%2Frss%2Fcurrent+%28Nature+-+Issue%29#ref-CR1\">1<\/a><\/sup>\u00a0report no evidence of a deformation of the inner orbit, which would be expected if there were a difference between the accelerations of the neutron star and the inner white dwarf towards the outer white dwarf. The results provide support for Einstein\u2019s theory of gravity \u2014 the general theory of relativity.<\/span><\/p>\n<\/figcaption><\/figure>\n<p>&nbsp;<\/p>\n<p>If the neutron star and the inner white dwarf were to fall with different accelerations towards the outer white dwarf, there would be a tiny deformation of the inner orbit. Archibald and colleagues report an analysis of approximately six years of data showing no evidence of such a deformation. The accelerations of the two bodies differ by no more than 2.6 parts per million, in agreement with the equivalence principle.<\/p>\n<p>Tests of this principle have a long heritage. In the late nineteenth century, the Hungarian physicist Roland von E\u00f6tv\u00f6s devoted years to verifying that the accelerations of various laboratory materials in Earth\u2019s gravitational field differ by less than a few parts per billion<sup><a href=\"https:\/\/www.nature.com\/articles\/d41586-018-05549-4?utm_source=feedburner&amp;utm_medium=feed&amp;utm_campaign=Feed%3A+nature%2Frss%2Fcurrent+%28Nature+-+Issue%29#ref-CR3\">3<\/a><\/sup>. His modern-day successors, the E\u00f6t-Wash group<sup><a href=\"https:\/\/www.nature.com\/articles\/d41586-018-05549-4?utm_source=feedburner&amp;utm_medium=feed&amp;utm_campaign=Feed%3A+nature%2Frss%2Fcurrent+%28Nature+-+Issue%29#ref-CR4\">4<\/a><\/sup>\u00a0in Seattle, Washington, pushed this bound to parts per 10<sup>13<\/sup>. And, in 2017, data from the French space mission MICROSCOPE<sup><a href=\"https:\/\/www.nature.com\/articles\/d41586-018-05549-4?utm_source=feedburner&amp;utm_medium=feed&amp;utm_campaign=Feed%3A+nature%2Frss%2Fcurrent+%28Nature+-+Issue%29#ref-CR5\">5<\/a><\/sup>\u00a0moved the goalpost by a further factor of ten.<\/p>\n<p>Given that a typical object in a physics lab consists of a swarm of elementary particles and their associated fields and energies, it is quite extraordinary that the responses of different materials to gravity should be so similar. In Einstein\u2019s unique imagination, there was a reason: gravity is not a force that acts on all of these particles in some fantastically fine-tuned manner, but is simply an effect of space-time geometry. The constituents of matter follow universal paths in a space-time that is curved by massive bodies, such as Earth or the Sun.<\/p>\n<p>But does gravitational energy act in the same way as matter? The small objects used in lab experiments do not contain enough gravitational energy to answer this question, but planets and stars do. With self-gravity in the picture, a concept called the strong equivalence principle comes into play. This principle singles out the general theory of relativity from its competitors. In Einstein\u2019s theory, all bodies \u2014 hammers, feathers, planets, neutron stars, white dwarfs and even black holes \u2014 fall with the same acceleration. But in most alternative theories of gravity, such as scalar\u2013tensor theories<sup><a href=\"https:\/\/www.nature.com\/articles\/d41586-018-05549-4?utm_source=feedburner&amp;utm_medium=feed&amp;utm_campaign=Feed%3A+nature%2Frss%2Fcurrent+%28Nature+-+Issue%29#ref-CR6\">6<\/a><\/sup>, the equivalence principle is violated for bodies that have self-gravity.<\/p>\n<p>For almost 50 years, researchers have measured how long it takes for laser pulses to make the round trip from Earth to the Moon and back \u2014 a technique known as lunar laser ranging. Analyses of these data<sup><a href=\"https:\/\/www.nature.com\/articles\/d41586-018-05549-4?utm_source=feedburner&amp;utm_medium=feed&amp;utm_campaign=Feed%3A+nature%2Frss%2Fcurrent+%28Nature+-+Issue%29#ref-CR7\">7<\/a><\/sup><sup>,<\/sup><sup><a href=\"https:\/\/www.nature.com\/articles\/d41586-018-05549-4?utm_source=feedburner&amp;utm_medium=feed&amp;utm_campaign=Feed%3A+nature%2Frss%2Fcurrent+%28Nature+-+Issue%29#ref-CR8\">8<\/a><\/sup>\u00a0have verified the strong equivalence principle, by showing that the accelerations of the two bodies towards the Sun differ by no more than a few parts per 10<sup>13<\/sup>. Because about 5 parts in 10<sup>10<\/sup>\u00a0of Earth\u2019s mass is gravitational energy<sup><a href=\"https:\/\/www.nature.com\/articles\/d41586-018-05549-4?utm_source=feedburner&amp;utm_medium=feed&amp;utm_campaign=Feed%3A+nature%2Frss%2Fcurrent+%28Nature+-+Issue%29#ref-CR9\">9<\/a><\/sup>, this result implies that the accelerations of gravitational energy and matter differ by less than a few parts per 10<sup>4<\/sup>.<\/p>\n<p>Archibald and colleagues\u2019 study breaks new ground because the gravitational energy inside a neutron star can account for as much as 20% of the body\u2019s mass<sup><a href=\"https:\/\/www.nature.com\/articles\/d41586-018-05549-4?utm_source=feedburner&amp;utm_medium=feed&amp;utm_campaign=Feed%3A+nature%2Frss%2Fcurrent+%28Nature+-+Issue%29#ref-CR10\">10<\/a><\/sup>. The authors\u2019 results therefore imply that the accelerations of gravitational energy and matter differ by no more than a few parts per 10<sup>5<\/sup>\u00a0\u2014 a tenfold improvement over the bound from lunar laser ranging.<\/p>\n<p>More importantly, the authors have provided what is known as a strong-field test of general relativity. Unlike the Solar System, for which Einstein\u2019s theory predicts only small deviations from Newton\u2019s theory of gravity, the motion of a neutron star in a gravitational field invokes full general relativity in all its complex glory. Einstein\u2019s theory passes this strong-field test with flying colours.<\/p>\n<p>Because general relativity predicts a null effect, the grading is a simple pass or fail. But for alternative theories, invoking strong-gravity effects substantially complicates the interpretation of the results. Archibald\u00a0<i>et al.<\/i>\u00a0demonstrate this complexity using scalar\u2013tensor theories as an example. For these theories, the interpretation of the results depends on the internal structure assumed for the neutron star and on the values chosen for quantities known as coupling constants. The authors show that their results improve on certain pre-existing constraints on the parameters that govern these theories \u2014 some arising from Solar System measurements and some from data on binary systems containing a pulsar. Although the theories are not completely quashed, their hopes for validity have been made that much fainter.<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p><span class=\"emphasis\">Nature<\/span>\u00a0<strong>559<\/strong>, 40-41 (2018)<\/p>\n<div class=\"emphasis\">doi: 10.1038\/d41586-018-05549-4<\/div>\n<\/div>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>\uc544\ub798\ub294 2023\ub144 7\uc6d4 20\uc77c \ub274\uc2a4\uc785\ub2c8\ub2e4~<\/p>\n<p>(\uc6d0\ubb38: <a href=\"https:\/\/n.news.naver.com\/mnews\/article\/053\/0000037417\">\uc5ec\uae30<\/a>\ub97c \ud074\ub9ad\ud558\uc138\uc694~)<\/p>\n<p>&nbsp;<\/p>\n<div class=\"media_end_head go_trans\">\n<div class=\"media_end_head_title\">\n<h2 id=\"title_area\" class=\"media_end_head_headline\">\uc544\uc778\uc288\ud0c0\uc778 \uc774\ub860 \ub610 \uc99d\uba85&#8230;\ube45\ubc45 10\uc5b5\ub144 \ud6c4 &#8216;\uc2dc\uac04 \uc9c0\uc5f0&#8217; \ud3ec\ucc29<\/h2>\n<\/div>\n<div class=\"media_end_head_info nv_notrans \">\n<div class=\"media_end_head_info_datestamp\"><\/div>\n<div class=\"media_end_head_info_variety\">\n<div class=\"media_end_head_info_variety_right\">\n<div class=\"media_end_head_print\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div id=\"contents\" class=\"newsct_body\">\n<div id=\"newsct_article\" class=\"newsct_article _article_body\">\n<div id=\"dic_area\" class=\"go_trans _article_content\">\n<div>\n<div class=\"nbd_im_w _LAZY_LOADING_WRAP \">\n<div id=\"img_a1\" class=\"nbd_a _LAZY_LOADING_ERROR_HIDE\"><img decoding=\"async\" id=\"img1\" class=\"_LAZY_LOADING\" src=\"https:\/\/imgnews.pstatic.net\/image\/053\/2023\/07\/20\/0000037417_001_20230720040101108.gif?type=w647\" \/><\/div>\n<\/div>\n<p><span class=\"end_photo_org\"><em class=\"img_desc\">\uc9c0\uad6c\uc5d0\uc11c \uad00\uce21\ud560 \uc218 \uc788\ub294 \uac00\uc7a5 \uba3c \uac70\ub9ac\uc758 \ucc9c\uccb4\uc774\uc790 \ucd08\uac70\ub300 \uc9c8\ub7c9\uc758 \ube14\ub799\ud640\uc778 \ud018\uc774\uc0ac.\u00a0<span data-type=\"ore\" data-lang=\"en\">photo<\/span>\u00a0\ub274\uc2dc\uc2a4<\/em><\/span><\/div>\n<p>\uc544\uc778\uc288\ud0c0\uc778\uc758 &#8216;\uc2dc\uac04 \uc9c0\uc5f0(<span data-type=\"ore\" data-lang=\"en\">time<\/span>\u00a0<span data-type=\"ore\" data-lang=\"en\">dilation<\/span>)&#8217;\uc744 \ub4b7\ubc1b\uce68\ud560 \ud754\uc801\uc774 \ucd08\uae30 \uc6b0\uc8fc\uc5d0\uc11c \uc2e4\uc81c\ub85c \uad00\uce21\ub3fc \ud654\uc81c\ub2e4. \ube45\ubc45 \ubc1c\uc0dd \uc774\ud6c4 10\uc5b5\ub144 \uc9c0\ub09c \uc6b0\uc8fc\uc758 \uc2dc\uac04\uc774 \uc9c0\uae08\uc5d0 \ube44\ud574 5\ubc30 \ub290\ub9ac\uac8c \ud758\ub800\ub2e4\ub294 \uc0ac\uc2e4\uc774 \uad00\uce21\ub41c \uac83\uc774\ub2e4.<\/p>\n<p><strong>\uc2dc\uac04 \ub418\ub3cc\ub9ac\ub2c8 5\ubc30 \ub290\ub9ac\uac8c \ud758\ub7ec<\/strong><\/p>\n<p>&#8216;\uc2dc\uac04 \ud33d\ucc3d&#8217;\uc73c\ub85c\ub3c4 \ubd88\ub9ac\ub294 \uc2dc\uac04 \uc9c0\uc5f0\uc740 \uc544\uc778\uc288\ud0c0\uc778\uc758 \ud2b9\uc218\uc0c1\ub300\uc131 \uc774\ub860\uacfc 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\ud750\ub984\uc744 \ub2a6\ucd98\ub2e4&#8217;. \uac15\ud55c \uc911\ub825\uc774 \uc2dc\uacf5\uac04\uc744 \ud718\uac8c \ud558\uc5ec \uc2dc\uac04 \uc9c0\uc5f0\uc744 \uc720\ubc1c\ud55c\ub2e4\ub294 \uac83\uc774\ub2e4. \ud2b9\uc218\uc0c1\ub300\uc131 \uc774\ub860\uacfc \ub2ec\ub9ac \uc77c\ubc18\uc0c1\ub300\uc131 \uc774\ub860\uc5d0\uc11c\ub294 \uad00\uce21\uc790\uac00 \uc815\uc9c0, \ub4f1\uc18d\uc77c \ub54c\ub97c \ud3ec\ud568\ud558\uc5ec \uac00\uc18d \uc6b4\ub3d9\ud558\ub294 \ubaa8\ub4e0 \uc0c1\ud669\uae4c\uc9c0\ub3c4 \uc801\uc6a9 \uac00\ub2a5\ud558\ub2e4.<\/p>\n<p>\ub450 \uc0c1\ub300\uc131 \uc774\ub860\uc744 \uc885\ud569\ud558\uba74, &#8216;\uc2dc\uac04 \uc9c0\uc5f0&#8217;\uc740 \uc2dc\uacf5\uac04\uc758 \uad6c\uc870 \ubcc0\ud654\uc5d0 \ub530\ub978 \uac83\uc73c\ub85c \uad00\uce21\uc790\uc758 \uc6b4\ub3d9 \uc0c1\ud0dc\ub098 \uc911\ub825\uc758 \ud06c\uae30\uc5d0 \ub530\ub77c \uc5b4\ub5a4 \ub450 \uc0ac\uac74 \uc0ac\uc774\uc758 \uc2dc\uac04 \uac04\uaca9\uc774 \ub2e4\ub974\uac8c 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\uc788\uc5c8\ub2e4.<\/p>\n<p>\ud018\uc774\uc0ac\ub294 \uc9c0\uad6c\uc5d0\uc11c \uad00\uce21\ud560 \uc218 \uc788\ub294 \uac00\uc7a5 \uba3c \uac70\ub9ac\uc758 \ucc9c\uccb4\uc774\uc790 \ucd08\uac70\ub300 \uc9c8\ub7c9\uc758 \ube14\ub799\ud640\uc774\uace0, \uac15\ud55c \uc5d0\ub108\uc9c0\ub97c \ubc29\ucd9c\ud558\ub294 \ud65c\ub3d9 \uc740\ud558\ub2e4. \uc804\ud30c\ubfd0 \uc544\ub2c8\ub77c \uac70\uc758 \ubaa8\ub4e0 \uc804\uc790\uae30\ud30c \ub300\uc5ed\uc5d0\uc11c \ub9e4\uc6b0 \uac15\ud55c \uc5d0\ub108\uc9c0\ub97c \ub0b8\ub2e4. \uadf8 \ub54c\ubb38\uc5d0 \uc218\uc2ed\uc5b5 \uad11\ub144 \ub5a8\uc5b4\uc838 \uc788\ub294\ub370\ub3c4 \ub9c8\uce58 \ubcc4\ucc98\ub7fc \ubc1d\uac8c \ubcf4\uc778\ub2e4.<\/p>\n<p>\ub8e8\uc774\uc2a4 \uad50\uc218\ub294 &#8220;\ucd08\uc2e0\uc131\uc740 \ubc1d\uace0 \ub2e8\uc77c \uc12c\uad11\ucc98\ub7fc \uc6c0\uc9c1\uc5ec \uc5f0\uad6c\ud558\uae30\uac00 \uc27d\uc9c0\ub9cc, \ud018\uc774\uc0ac\ub294 \ubd88\uaf43\ub180\uc774\ucc98\ub7fc \ubcf5\uc7a1\ud558\ub2e4. \uc6b0\ub9ac\ub294 \uc774 \ubd88\uaf43\ub180\uc774\ub97c \ubd84\uc11d\ud574 \ud018\uc774\uc0ac\ub3c4 \ucd08\uae30 \uc6b0\uc8fc\uc758 \ud45c\uc900\uc2dc\uac04 \uc9c0\ud45c\ub85c \uc0ac\uc6a9\ub420 \uc218 \uc788\uc74c\uc744 \ud655\uc778\ud588\ub2e4&#8221;\uba70 \ud45c\uc900\uc2dc\uac04 \ud65c\uc6a9\uc5d0 \ud070 \ub9cc\uc871\uac10\uc744 \ub098\ud0c0\ub0c8\ub2e4.<\/p>\n<p>\ud45c\uc900\uc2dc\uacc4\ub294 \uad00\uce21 \uc2dc\uc810\uc5d0 \ub530\ub77c \uc6b0\uc8fc\uc758 \uc2dc\uac04\uc774 \uc5bc\ub9c8\ub098 \ube60\ub974\uac8c \ud758\ub800\ub294\uc9c0 \ud655\uc778\ud560 \uc218 \uc788\ub294 \uae30\uc900\uc73c\ub85c \ud65c\uc6a9\ud588\ub2e4. \uc5f0\uad6c\ud300\uc740 \ud45c\uc900\uc2dc\uacc4\ub97c \ube45\ubc45\uc774 \uc77c\uc5b4\ub09c \ud6c4 10\uc5b5\ub144\uc774 \ud750\ub978 \uc2dc\uc810\uc73c\ub85c \ub418\ub3cc\ub838\ub2e4. \uadf8 \uacb0\uacfc 138\uc5b5\ub144 \uc804 \uc6b0\uc8fc\uc758 \uc2dc\ucd08\uc778 \ube45\ubc45\uc774 \ubc1c\uc0dd\ud55c \ub4a4 10\uc5b5\ub144\uc774 \ud750\ub978 \uc6b0\uc8fc\uc5d0\uc11c\ub294 \uc2dc\uac04\uc774 \ud604\uc7ac\ubcf4\ub2e4 5\ubc30\ucbe4 \ub290\ub9ac\uac8c \uac00\ub294 \uac83\uc73c\ub85c \ud655\uc778\ub410\ub2e4. \uc774\ub294 \uc544\uc778\uc288\ud0c0\uc778\uc774 \uc9c0\uc801\ud55c &#8216;\uc2dc\uac04 \uc9c0\uc5f0&#8217; \ud604\uc0c1\uc774 \ubc1c\uc0dd\ud588\uae30 \ub54c\ubb38\uc73c\ub85c \ud480\uc774\ub41c\ub2e4. \ub8e8\uc774\uc2a4 \uad50\uc218\ub294 &#8220;\uc5ec\ub7ec\ubd84\uc774 \ub9cc\uc57d \uc774 \ucd08\uae30 \uc6b0\uc8fc\uc5d0 \uc788\ub2e4\uba74 1\ucd08\uac00 1\ucd08\ucc98\ub7fc \ub290\uaef4\uc9c0\uaca0\uc9c0\ub9cc, 120\uc5b5\ub144\uc774 \uc9c0\ub09c \ubbf8\ub798\uc758 \uc6b0\ub9ac \uc785\uc7a5\uc5d0\uc11c\ub294 \uadf8 \ucd08\uae30 \uc2dc\uac04\uc774 \uae38\uac8c \ub290\uaef4\uc9c8 \uac83\uc774\ub2e4&#8221;\ub77c\ub294 \ub9d0\ub85c \uc2dc\uac04 \uc9c0\uc5f0\uc744 \uc124\uba85\ud588\ub2e4.<\/p>\n<div>\n<div class=\"nbd_im_w _LAZY_LOADING_WRAP is_long\">\n<div id=\"img_a2\" class=\"nbd_a _LAZY_LOADING_ERROR_HIDE\"><img decoding=\"async\" id=\"img2\" class=\"_LAZY_LOADING\" src=\"https:\/\/imgnews.pstatic.net\/image\/053\/2023\/07\/20\/0000037417_002_20230720040101157.gif?type=w647\" \/><\/div>\n<\/div>\n<p><span class=\"end_photo_org\"><em class=\"img_desc\">\uc0dd\uc804\uc758 \uc544\uc778\uc288\ud0c0\uc778.\u00a0<span data-type=\"ore\" data-lang=\"en\">photo<\/span>\u00a0\ub274\uc2dc\uc2a4<\/em><\/span><\/div>\n<p><strong>\uc2dc\uac04 \uc9c0\uc5f0, 30\u339d \ub192\uc774\uc5d0\uc11c\ub3c4 \uc77c\uc5b4\ub09c\ub2e4<\/strong><\/p>\n<p>\uc774\ubcf4\ub2e4 \uc55e\uc11c \uc774\ub904\uc9c4 \uc5f0\uad6c\ud300\uc758 \ud018\uc774\uc0ac \uad00\uce21 \uc5f0\uad6c\uc5d0\uc11c\ub294 \uc2dc\uac04 \uc9c0\uc5f0\uc744 \ud655\uc778\ud558\uc9c0 \ubabb\ud588\ub2e4. \uc774\ubc88\uacfc \ub300\uc870\ub418\ub294 \uacb0\uacfc\ub85c \uc778\ud574 \uc6b0\uc8fc \ud33d\ucc3d\uc5d0 \ub300\ud55c \ub9ce\uc740 \uc758\ubb38\uc774 \ud480\ub9ac\uc9c0 \uc54a\uc740 \uc0c1\ud0dc\uc600\ub2e4. \ud558\uc9c0\ub9cc \uc0c8\ub85c\uc6b4 \ub370\uc774\ud130 \ubd84\uc11d \uacb0\uacfc\ub294 \uc774 \uac19\uc740 \uc758\ubb38\uc744 \ub9d0\ub054\ud788 \uc53b\uc5b4\ub0b4\uae30\uc5d0 \ucda9\ubd84\ud588\ub2e4.<\/p>\n<p>\ub8e8\uc774\uc2a4 \uad50\uc218\ub294 &#8220;\uc544\uc778\uc288\ud0c0\uc778 \ub355\ubd84\uc5d0 \uc6b0\ub9ac\ub294 \uc2dc\uac04\uacfc \uacf5\uac04\uc774 \uc5bd\ud600 \uc788\uace0, \ube45\ubc45\uc774 \uc2dc\uc791\ub41c \ud2b9\uc774\uc810\uc73c\ub85c\ubd80\ud130 \uc6b0\uc8fc\uac00 \ud33d\ucc3d\ud558\uace0 \uc788\ub2e4\ub294 \uac83\uc744 \uc54c\uac8c \ub410\ub2e4&#8221;\uba70 &#8220;\uc774\ub7f0 \uacf5\uac04 \ud33d\ucc3d\uc740 \ucd08\uae30 \uc6b0\uc8fc\ub97c \uad00\uce21\ud560 \ub54c \ud604\uc7ac\ubcf4\ub2e4 \uc2dc\uac04\uc774 \ud6e8\uc52c \ub290\ub9ac\uac8c \ud750\ub974\ub294 \uac83\uc73c\ub85c \uad00\uce21\ub3fc\uc57c \ud55c\ub2e4\ub294 \uac83\uc744 \uc758\ubbf8\ud55c\ub2e4&#8221;\uace0 \ub9d0\ud588\ub2e4.<\/p>\n<p>\uc774\uc5b4 \uadf8\ub294 &#8220;\uc6b0\ub9ac\ub294 \uadf8\uac83\uc744 \uc99d\uba85\ud558\uae30 \uc704\ud574 \ube45\ubc45\uc774 \uc77c\uc5b4\ub09c \ud6c4 10\uc5b5\ub144\uc774 \uc9c0\ub09c \ucd08\uae30 \uc6b0\uc8fc \uc740\ud558\uc758 \ud018\uc774\uc0ac\ub97c \ubd84\uc11d\ud588\uace0, \uadf8 \uacb0\uacfc \uc544\uc778\uc288\ud0c0\uc778\uc758 \uc608\uce21\ub300\ub85c \uc9c0\uae08\ubcf4\ub2e4 \uc2dc\uac04\uc774 5\ubc30 \ub290\ub9ac\uac8c \uac00\ub294 \uc9c0\uc5f0 \ud604\uc0c1\uc744 \ubc1c\uacac\ud558\uac8c \ub410\ub2e4&#8221;\uace0 \uc5f0\uad6c \uacb0\uacfc\ub97c \uc124\uba85\ud588\ub2e4. \uc5f0\uad6c\ud300\uc740 \uc6b0\uc8fc\uac00 \ub098\uc774\ub97c \uba39\uc74c\uc5d0 \ub530\ub77c \uc2dc\uac04\uc774 \ud750\ub974\ub294 \uc18d\ub3c4\ub3c4 \uc810\uc810 \ube68\ub77c\uc9c4\ub2e4\ub294 \uac83\ub3c4 \ud655\uc778\ud588\ub2e4. \uc774\ub4e4\uc758 \uc5f0\uad6c \uacb0\uacfc\ub294 \uad6d\uc81c \ud559\uc220\uc9c0 &#8216;\ub124\uc774\ucc98 \ucc9c\ubb38\ud559&#8217;\uc5d0 \ubc1c\ud45c\ub410\ub2e4.<\/p>\n<p>\uc544\uc778\uc288\ud0c0\uc778\uc758 \uc0c1\ub300\uc131 \uc774\ub860\uc774 \uc608\uacac\ud588\ub4ef, \uc2dc\uac04 \uc9c0\uc5f0\uc740 \ube14\ub799\ud640\ucc98\ub7fc \uc911\ub825\uc774 \uc544\uc8fc \uac15\ud55c \uacf3 \uc8fc\ubcc0\uc5d0\uc11c \uc2e4\uc81c\ub85c \ubc8c\uc5b4\uc9c4\ub2e4. \ud558\uc9c0\ub9cc \uc2e4\uc740 \uc6b0\ub9ac \uc77c\uc0c1\uc0dd\ud65c \uc18d\uc5d0\uc11c\ub3c4 \ub298 \uc77c\uc5b4\ub098\uace0 \uc788\ub2e4. \ubaa8\ub4e0 \ubb3c\uccb4\uc5d0\ub294 \uc9c8\ub7c9\uc774 \uc788\uace0, \uc9c8\ub7c9\uc774 \uc788\ub294 \uacf3\uc5d4 \uc911\ub825\uc774 \uc788\uace0, \ud06c\uac74 \uc791\uac74 \uc911\ub825\uc740 \ubc18\ub4dc\uc2dc \uc2dc\uacf5\uac04\uc744 \uc65c\uace1\ud558\uae30 \ub54c\ubb38\uc774\ub2e4. \uc77c\uc0c1\uc5d0\uc11c\ub294 \uc6cc\ub099 \uadf8 \ucc28\uc774\uac00 \ubbf8\ubbf8\ud574 \uc798 \ub290\ub07c\uc9c0\ub3c4 \ubabb\ud558\uace0, \uc2dc\uac04 \uc9c0\uc5f0 \uc874\uc7ac \uc790\uccb4\ub3c4 \ubbff\uae30 \ud798\ub4e4\uc9c0\ub9cc \uc815\ubc00\ud55c \uc2e4\ud5d8\uc744 \ud1b5\ud574 \uadf8 \uc874\uc7ac\ub294 \uc5ec\ub7ec \ubc88 \uc99d\uba85\ub418\uc5c8\ub2e4.<\/p>\n<p>\uac00\uc7a5 \uadf9\uc801\uc778 \uc608\ub294 2010\ub144 \uad6d\uc81c\ud559\uc220\uc9c0 &#8216;\uc0ac\uc774\uc5b8\uc2a4&#8217;\uc5d0 \ubc1c\ud45c\ub41c \ubbf8\uad6d\ud45c\uc900\uae30\uc220\uc5f0\uad6c\uc18c(<span data-type=\"ore\" data-lang=\"en\">NIST<\/span>) \uc81c\uc784\uc2a4 \uce6d\uc6d0 \ucd08 \ubc15\uc0ac\ud300\uc758 \uc5f0\uad6c \uacb0\uacfc\ub2e4. \uc5f0\uad6c\ud300\uc740\u00a0<span data-type=\"ore\" data-lang=\"en\">&#8217;37<\/span>\uc5b5\ub144\uc5d0 1\ucd08&#8217; \ubbf8\ub9cc\uc758 \uc624\ucc28\ub97c \uac00\uc9c4 \ucd08\uc815\ubc00 \uc6d0\uc790\uc2dc\uacc4 2\ub300\ub97c \uc774\uc6a9\ud574 \uc2dc\uac04 \uc9c0\uc5f0\uc744 \uc2e4\ud5d8\ud588\ub2e4. \uc6d0\uc790\uc2dc\uacc4 \ud558\ub098\ub294 \uc2e4\ud5d8\uc2e4 \ubc14\ub2e5\uc5d0 \ub193\uace0, \ub2e4\ub978 \ud558\ub098\ub294 \uc2e4\ud5d8\uc2e4 \ubc14\ub2e5\uc5d0\uc11c \uc57d 33\u339d \ub192\uc740 \uc704\uce58\uc5d0 \ub193\uc558\ub2e4. \uc774\ud6c4 \ub450 \uc2dc\uacc4\uc758 \uc2dc\uac04 \uc9c4\ud589 \ubc29\ud5a5\uc5d0 \ucc28\uc774\uac00 \uc0dd\uae30\ub294\uc9c0\ub97c \uce21\uc815\ud588\ub2e4.<\/p>\n<p>\uadf8 \uacb0\uacfc 33\u339d \ub192\uc774\uc758 \uc2dc\uacc4\uac00 \uc9c0\uba74\uc758 \uc2dc\uacc4\uc5d0 \ube44\ud574 10\uacbd\ubd84\uc7584 \uc815\ub3c4 \ube68\ub9ac \ud750\ub978 \uac83\uc73c\ub85c \ub098\ud0c0\ub0ac\ub2e4. \ub450 \ubf18\ub3c4 \ucc44 \ub420 \uac83 \uac19\uc9c0 \uc54a\uc740 \uadfc\uc18c\ud55c \ucc28\uc774\uc758 \ub192\uc774\uc5d0\uc11c \uc911\ub825\uc758 \ucc28\uc774\uc5d0 \uc758\ud55c \uc2dc\uac04 \uc9c0\uc5f0 \ud6a8\uacfc\uac00 \ubc1c\uc0dd\ud55c \uac83\uc774\ub2e4. \uc815\ub9d0 \ub180\ub77c\uc6b4 \uc77c\uc774\ub2e4. \uc778\uac04\uc774 \ubaa8\ub450 80\ub144\uc744 \uc0b0\ub2e4\uace0 \uac00\uc815\ud560 \ub54c, \uc774\ub294 33\u339d \ub192\uc740 \uacf3\uc5d0\uc11c \uc0dd\ud65c\ud558\ub294 \uc0ac\ub78c\uc774 \uc57d 900\uc5b5\ubd84\uc7581\ucd08 \uc77c\ucc0d \uc8fd\ub294\ub2e4\ub294 \uac83\uc744 \uc758\ubbf8\ud55c\ub2e4. \uc6b0\ub9ac\uc758 \uc0dd\ud65c\uc5d0\ub294 \uc804\ud600 \uc601\ud5a5\uc744 \uc8fc\uc9c0 \uc54a\ub294 \uc2dc\uac04\uc774\uc9c0\ub9cc \uc774\uac83\uc740 \ubb3c\ub9ac\ud559\uc801\uc73c\ub85c \ud070 \uc758\ubbf8\ub97c \uac00\uc9c4\ub2e4.<\/p><\/div>\n<\/div>\n<\/div>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>&nbsp; &nbsp; (\uc6d0\ubb38) &nbsp; \uad6d\uc81c\uacf5\ub3d9\uc5f0\uad6c\uc9c4 &#8220;\uc0bc\uc911\uc131\uacc4 \uad00\uce21 \ud1b5\ud574 \uc77c\ubc18\uc0c1\ub300\uc131\uc774\ub860 \ub4f1\uac00\uc6d0\ub9ac \ud655\uc778&#8221; &nbsp; \uc544\uc778\uc288\ud0c0\uc778\uc758 \uc77c\ubc18\uc0c1\ub300\uc131\uc774\ub860(general\u00a0theory\u00a0of\u00a0relativity)\uc774 \ub610 \ud558\ub098\uc758 \uc5c4\uc815\ud55c \uc2dc\ud5d8\ub300\ub97c \ud1b5\uacfc\ud588\ub2e4. \ub124\ub35c\ub780\ub4dc \uc804\ud30c\ucc9c\ubb38\ud559\uc5f0\uad6c\uc18c \uc564 \uc544\uce58\ubcfc\ub4dc \ubc15\uc0ac\uac00 \uc774\ub044\ub294<a href=\"https:\/\/biochemistry.khu.ac.kr\/lab\/?p=1040\" class=\"more-link\">(more&#8230;)<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[36,29,30],"tags":[10,3,4],"class_list":["post-1040","post","type-post","status-publish","format-standard","hentry","category-lets-do-physics","category-lets-do-science","category-recent-science-news","tag-lets-do-physics","tag-lets-do-science","tag-recent-science-news"],"aioseo_notices":[],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack-related-posts":[{"id":1733,"url":"https:\/\/biochemistry.khu.ac.kr\/lab\/?p=1733","url_meta":{"origin":1040,"position":0},"title":"\u2018\ud5c8\ube14\u2019\uc774 \uc7a1\uc740 \ub180\ub77c\uc6b4 \ud0dc\uace0\uc758 \uc740\ud558\ub4e4 &#038; \ube44\uc0c1\ud558\ub294 \ubd88\uc0c8\u2026\uc81c\uc784\uc2a4\uc6f9\uc774 1\ub144\uac04 \ubc14\uafbc \uc778\ub958\uc758 \uad00\uc810 &#038;&#038;","author":"biochemistry","date":"September 16, 2018","format":false,"excerpt":"\u00a0 \u00a0 (\uc6d0\ubb38: \uc5ec\uae30\ub97c \ud074\ub9ad\ud558\uc138\uc694~) \u00a0 \ud5c8\ube14 \ub9dd\uc6d0\uacbd\uc774 \uc7a1\uc740 \uc544\ubca8 370 \uc740\ud558\ub2e8\uc758 \uc0c8\ub85c\uc6b4 \uc774\ubbf8\uc9c0. \uacf3\uacf3\uc5d0 \ubcf4\uc774\ub294 \ud638\ub4e4\uc740 \uc911\ub825 \ub80c\uc988 \ud604\uc0c1\uc73c\ub85c \ud3ec\ucc29\ub41c \ubc30\uacbd\uc758 \uba3c \ucd08\uae30 \uc740\ud558\ub4e4 \ubaa8\uc2b5\uc774\ub2e4.(\ucd10\ucc98:\u00a0NASA,\u00a0ESA\/Hubble,\u00a0HST\u00a0Frontier\u00a0Fields) \u00a0 -\ubc84\ud314\ub85c(BUFFALO) \ud504\ub85c\uc81d\ud2b8\ub85c \ucd08\uae30 \uc740\ud558 \ud615\uc131\uc744 \ubc1d\ud78c\ub2e4\u00a0 \ud5c8\ube14 \uc6b0\uc8fc \ub9dd\uc6d0\uacbd\uc774 \uc6b0\uc8fc\uc5d0\uc11c \uac00\uc7a5 \uba40\ub9ac \ub5a8\uc5b4\uc838 \uc788\ub294 \uc740\ud558\uacc4\ub97c \uc7a1\uc740 \ub180\ub77c\uc6b4 \uc774\ubbf8\uc9c0\uac00 13\uc77c(\ud604\uc9c0\uc2dc\uac04) \uc6b0\uc8fc \uc804\ubb38 \uc0ac\uc774\ud2b8 \uc2a4\ud398\uc774\uc2a4\ub2f7\ucef4\uc5d0\u2026","rel":"","context":"In &quot;Essays on Science&quot;","block_context":{"text":"Essays on Science","link":"https:\/\/biochemistry.khu.ac.kr\/lab\/?cat=32"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":4499,"url":"https:\/\/biochemistry.khu.ac.kr\/lab\/?p=4499","url_meta":{"origin":1040,"position":1},"title":"\uc778\ub958 \uccab \ube14\ub799\ud640 \ubc1c\uacac\uc758 \uc77c\ub4f1\uacf5\uc2e0 EHT \uadf8\ub9ac\uace0 \uc911\ub825\ud30c &#038; \uc0ac\uac74\uc758 \uc9c0\ud3c9\uc120, \uadf8\ub9ac\uace0 \ube14\ub799\ud640","author":"biochemistry","date":"October 18, 2019","format":false,"excerpt":"\u00a0 \u00a0 2019\ub144 4\uc6d4 \uc778\ub958 \uc5ed\uc0ac\uc0c1 \ucd5c\ucd08 \ube14\ub799\ud640 \ubc1c\uacac\uc73c\ub85c \uc544\uc778\uc288\ud0c0\uc778 \uc77c\ubc18\uc0c1\ub300\uc131 \uc774\ub860 \uc785\uc99d \uc9c0\uad6c \ub9cc\ud55c \ud06c\uae30\uc758 \uc804\ud30c\ub9dd\uc6d0\uacbd \ud1b5\ud574 5500\ub9cc \uad11\ub144 \uac70\ub9ac \ucd08\ub300\uc9c8\ub7c9 \ube14\ub799\ud640 \uad00\uce21 \uc131\uacf5 2016\ub144\uc5d4 \ube14\ub799\ud640 \uac04 \ucda9\ub3cc\uc758 \ud754\uc801 \uc911\ub825\ud30c \uac80\ucd9c \uc131\uacf5 \u00a0 \u00a0 \uc9c0\ub09c 4\uc6d4 \uc778\ub958 \uc5ed\uc0ac\uc0c1 \ucd5c\ucd08\ub85c \ube14\ub799\ud640\uc758 \ubaa8\uc2b5\uc774 \uacf5\uac1c\ub410\ub2e4. \uc544\uc778\uc288\ud0c0\uc778\uc758 \uc77c\ubc18\uc0c1\ub300\uc131\uc774\ub860\uc5d0\uc11c \uc874\uc7ac\ud558\ub358 \ube14\ub799\ud640\uc774 \uc2e4\uc7ac\uac00 \ub41c \uc21c\uac04\uc774\uc5c8\ub2e4.\u2026","rel":"","context":"In &quot;'01. \uc6b0\uc8fc: \ubbf8\uc2dc\uc5d0\uc11c \uac70\uc2dc\uae4c\uc9c0'\uc640 '02. \uc2dc\uac04\uacfc \uacf5\uac04' 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