{"id":41558,"date":"2019-08-15T16:01:34","date_gmt":"2019-08-15T13:01:34","guid":{"rendered":"https:\/\/omathimatikos.gr\/?p=41558"},"modified":"2019-08-15T20:19:44","modified_gmt":"2019-08-15T17:19:44","slug":"%ce%bc%ce%b1%cf%8d%cf%81%ce%b7-%cf%84%cf%81%cf%8d%cf%80%ce%b1-%cf%83%cf%84%ce%bf-%ce%ba%ce%ad%ce%bd%cf%84%cf%81%ce%bf-%cf%84%ce%bf%cf%85-%ce%b3%ce%b1%ce%bb%ce%b1%ce%be%ce%af%ce%b1-%ce%bc%ce%b1%cf%82","status":"publish","type":"post","link":"https:\/\/omathimatikos.gr\/?p=41558","title":{"rendered":"\u039c\u03b1\u03cd\u03c1\u03b7 \u03a4\u03c1\u03cd\u03c0\u03b1 \u03c3\u03c4\u03bf \u03ba\u03ad\u03bd\u03c4\u03c1\u03bf \u03c4\u03bf\u03c5 \u0393\u03b1\u03bb\u03b1\u03be\u03af\u03b1 \u03bc\u03b1\u03c2 \u03ac\u03c1\u03c7\u03b9\u03c3\u03b5 \u03bd\u03b1 \u03b5\u03ba\u03c0\u03ad\u03bc\u03c0\u03b5\u03b9\u2026 \u03c6\u03c9\u03c2"},"content":{"rendered":"<p><!--more--><\/p>\n<blockquote>\n<h4>T\u03bf\u03bd \u03c0\u03b5\u03c1\u03b1\u03c3\u03bc\u03ad\u03bd\u03bf \u039c\u03ac\u03b9\u03bf \u03bc\u03b9\u03b1 \u03c5\u03c0\u03b5\u03c1\u03bc\u03b5\u03b3\u03ad\u03b8\u03b7\u03c2 \u039c\u03b1\u03cd\u03c1\u03b7 \u03a4\u03c1\u03cd\u03c0\u03b1 \u03c3\u03c4\u03bf \u03ba\u03ad\u03bd\u03c4\u03c1\u03bf \u03c4\u03bf\u03c5 \u03b3\u03b1\u03bb\u03b1\u03be\u03af\u03b1 \u03bc\u03b1\u03c2 \u03ad\u03b3\u03b9\u03bd\u03b5 75 \u03c6\u03bf\u03c1\u03ad\u03c2 \u03c0\u03b9\u03bf \u03bb\u03b1\u03bc\u03c0\u03b5\u03c1\u03ae \u03bc\u03ad\u03c3\u03b1 \u03c3\u03b5 \u03b4\u03cd\u03bf \u03ce\u03c1\u03b5\u03c2.<\/h4>\n<\/blockquote>\n<p>\u0397 \u039c\u03b1\u03cd\u03c1\u03b7 \u03a4\u03c1\u03cd\u03c0\u03b1 \u03b3\u03bd\u03c9\u03c3\u03c4\u03ae \u03ba\u03b1\u03b9 \u03c9\u03c2 Sagittarius A* \u03b5\u03af\u03bd\u03b1\u03b9 \u03c4\u03ad\u03c3\u03c3\u03b5\u03c1\u03b9\u03c2 \u03b5\u03ba\u03b1\u03c4\u03bf\u03bc\u03bc\u03cd\u03c1\u03b9\u03b1 \u03c6\u03bf\u03c1\u03ad\u03c2 \u03bc\u03b5\u03b3\u03b1\u03bb\u03cd\u03c4\u03b5\u03c1\u03b7 \u03b1\u03c0\u03cc \u03c4\u03bf\u03bd \u0389\u03bb\u03b9\u03bf. \u03a9\u03c3\u03c4\u03cc\u03c3\u03bf, \u03c0\u03b1\u03c1\u03cc\u03c4\u03b9 \u03b4\u03b5\u03bd \u03b5\u03ba\u03c0\u03ad\u03bc\u03c0\u03b5\u03b9 \u03c6\u03c9\u03c2 \u03cc\u03c0\u03c9\u03c2 \u03ba\u03b1\u03b9 \u03ba\u03b1\u03bc\u03af\u03b1 \u03ac\u03bb\u03bb\u03b7 \u039c\u03b1\u03cd\u03c1\u03b7 \u03a4\u03c1\u03cd\u03c0\u03b1 \u03ac\u03bb\u03bb\u03c9\u03c3\u03c4\u03b5, \u03bf\u03b9 \u03b5\u03c0\u03b9\u03c3\u03c4\u03ae\u03bc\u03bf\u03bd\u03b5\u03c2 \u03bc\u03c0\u03cc\u03c1\u03b5\u03c3\u03b1\u03bd \u03bd\u03b1 \u03c0\u03b1\u03c1\u03b1\u03c4\u03b7\u03c1\u03ae\u03c3\u03bf\u03c5\u03bd \u03c4\u03b9\u03c2 \u03b1\u03bb\u03bb\u03b7\u03bb\u03b5\u03c0\u03b9\u03b4\u03c1\u03ac\u03c3\u03b5\u03b9\u03c2 \u03c4\u03b7\u03c2 \u03bc\u03b5 \u03c6\u03c9\u03c4\u03b5\u03b9\u03bd\u03ac \u03b1\u03c3\u03c4\u03ad\u03c1\u03b9\u03b1 \u03ae \u03c3\u03cd\u03bd\u03bd\u03b5\u03c6\u03b1 \u03c3\u03ba\u03cc\u03bd\u03b7\u03c2 \u03c0\u03bf\u03c5 \u03c4\u03b7\u03bd \u03c0\u03b5\u03c1\u03b9\u03b2\u03ac\u03bb\u03bb\u03bf\u03c5\u03bd.<\/p>\n<p>O \u03b1\u03c3\u03c4\u03c1\u03bf\u03bd\u03cc\u03bc\u03bf\u03c2 Tuan Do \u03c4\u03bf\u03c5 UCLA \u03ba\u03b1\u03b9 \u03bf\u03b9 \u03c3\u03c5\u03bd\u03b5\u03c1\u03b3\u03ac\u03c4\u03b5\u03c2 \u03c4\u03bf\u03c5 \u03c0\u03b1\u03c1\u03b1\u03ba\u03bf\u03bb\u03bf\u03c5\u03b8\u03bf\u03cd\u03c3\u03b1\u03bd \u03c4\u03bf\u03bd Sgr A* \u03c4\u03b7\u03c2 \u03bd\u03cd\u03c7\u03c4\u03b1 \u03c4\u03b7\u03c2 13\u03b7\u03c2 \u039c\u03b1\u0390\u03bf\u03c5, \u03bc\u03ad\u03c3\u03c9 \u03c4\u03bf\u03c5 \u03c4\u03b7\u03bb\u03b5\u03c3\u03ba\u03bf\u03c0\u03af\u03bf\u03c5 \u03c4\u03b7\u03bb\u03b5\u03c3\u03ba\u03cc\u03c0\u03b9\u03bf Keck \u03c3\u03b5 \u03b5\u03c0\u03b9\u03c3\u03c4\u03b7\u03bc\u03bf\u03bd\u03b9\u03ba\u03ae \u03c3\u03cd\u03bd\u03bf\u03b4\u03bf \u03ba\u03bf\u03c1\u03c5\u03c6\u03ae\u03c2 \u03c3\u03c4\u03bf \u03c0\u03b1\u03c1\u03b1\u03c4\u03b7\u03c1\u03b7\u03c4\u03ae\u03c1\u03b9\u03bf \u03c3\u03c4\u03bf \u03b7\u03c6\u03b1\u03af\u03c3\u03c4\u03b5\u03b9\u03bf Mauna Kea \u03c4\u03b7\u03c2 \u03a7\u03b1\u03b2\u03ac\u03b7\u03c2.<\/p>\n<p>\u0395\u03ba\u03b5\u03af \u03b4\u03b9\u03b1\u03c0\u03af\u03c3\u03c4\u03c9\u03c3\u03b1\u03bd \u03c0\u03c9\u03c2 \u03b7 Sgr A* \u03ad\u03b4\u03b5\u03b9\u03c7\u03bd\u03b5 75 \u03c6\u03bf\u03c1\u03ad\u03c2 \u03c6\u03c9\u03c4\u03b5\u03b9\u03bd\u03cc\u03c4\u03b5\u03c1\u03b7 \u03c3\u03c4\u03b7 \u03b6\u03ce\u03bd\u03b7 \u03c5\u03c0\u03ad\u03c1\u03c5\u03b8\u03c1\u03b7\u03c2 \u03b1\u03ba\u03c4\u03b9\u03bd\u03bf\u03b2\u03bf\u03bb\u03af\u03b1\u03c2 \u03c4\u03bf\u03c5 \u03c6\u03ac\u03c3\u03bc\u03b1\u03c4\u03bf\u03c2 \u03c6\u03c9\u03c4\u03cc\u03c2.<\/p>\n<p>To \u03b2\u03c1\u03ac\u03b4\u03c5 \u03b5\u03ba\u03b5\u03af\u03bd\u03bf \u03b7 \u03c5\u03c0\u03b5\u03c1\u03bc\u03b5\u03b3\u03ad\u03b8\u03b7\u03c2 \u039c\u03b1\u03cd\u03c1\u03b7 \u03a4\u03c1\u03cd\u03c0\u03b1 \u03ad\u03c6\u03c4\u03b1\u03c3\u03b5 \u03c3\u03c4\u03b1 \u03ba\u03b1\u03c4\u03ac \u03c0\u03bf\u03bb\u03cd \u03c0\u03b9\u03bf \u03c6\u03c9\u03c4\u03b5\u03b9\u03bd\u03ac \u03b5\u03c0\u03af\u03c0\u03b5\u03b4\u03b1 \u03c0\u03bf\u03c5 \u03ad\u03c7\u03bf\u03c5\u03bd \u03bc\u03b5\u03c4\u03c1\u03b7\u03b8\u03b5\u03af \u03c0\u03bf\u03c4\u03ad \u03c3\u03b5 \u03bc\u03ae\u03ba\u03bf\u03c2 \u03ba\u03cd\u03bc\u03b1\u03c4\u03bf\u03c2 \u03c5\u03c0\u03ad\u03c1\u03c5\u03b8\u03c1\u03c9\u03bd \u03b1\u03ba\u03c4\u03af\u03bd\u03c9\u03bd, \u03c3\u03cd\u03bc\u03c6\u03c9\u03bd\u03b1 \u03bc\u03b5 \u03c4\u03b7 \u03bc\u03b5\u03bb\u03ad\u03c4\u03b7 \u03c0\u03bf\u03c5 \u03b4\u03b7\u03bc\u03bf\u03c3\u03af\u03b5\u03c5\u03c3\u03b5 \u03b7 \u03bf\u03bc\u03ac\u03b4\u03b1 \u03bc\u03b5 \u03b5\u03c0\u03b9\u03ba\u03b5\u03c6\u03b1\u03bb\u03ae\u03c2 \u03c4\u03bf\u03bd Do \u03ba\u03b1\u03b9 \u03b4\u03b7\u03bc\u03bf\u03c3\u03b9\u03b5\u03cd\u03b8\u03b7\u03ba\u03b5 \u03c3\u03c4\u03bf arXiv.<\/p>\n<p>\u00ab\u03a0\u03b9\u03c3\u03c4\u03b5\u03cd\u03bf\u03c5\u03bc\u03b5 \u03cc\u03c4\u03b9 \u03ba\u03ac\u03c4\u03b9 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\u03c0\u03b1\u03c1\u03b5\u03bb\u03b8\u03cc\u03bd\u00bb, \u03b1\u03bd\u03b1\u03c6\u03ad\u03c1\u03b5\u03c4\u03b1\u03b9 \u03c3\u03b5 \u03c3\u03c7\u03b5\u03c4\u03b9\u03ba\u03ae \u03ad\u03ba\u03b8\u03b5\u03c3\u03b7.<\/p>\n<p>\u0397 \u03bc\u03ad\u03b3\u03b9\u03c3\u03c4\u03b7 \u03c6\u03c9\u03c4\u03b5\u03b9\u03bd\u03cc\u03c4\u03b7\u03c4\u03b1 \u03ae\u03c4\u03b1\u03bd \u03b7 \u03b4\u03b9\u03c0\u03bb\u03ac\u03c3\u03b9\u03b1 \u03c0\u03bf\u03c5 \u03ad\u03c7\u03b5\u03b9 \u03ba\u03b1\u03c4\u03b1\u03b3\u03c1\u03b1\u03c6\u03b5\u03af \u03c3\u03b5 \u03c3\u03c7\u03ad\u03c3\u03b7 \u03bc\u03b5 \u03c4\u03b7\u03bd \u03b1\u03bc\u03ad\u03c3\u03c9\u03c2 \u03c0\u03c1\u03bf\u03b7\u03b3\u03bf\u03cd\u03bc\u03b5\u03bd\u03b7 \u03b1\u03bd\u03ce\u03c4\u03b5\u03c1\u03b7 \u03bc\u03ad\u03c4\u03c1\u03b7\u03c3\u03b7 \u03c4\u03bf\u03c5 Sgr A * \u03c0\u03bf\u03c5 \u03ad\u03c7\u03b5\u03b9 \u03b3\u03af\u03bd\u03b5\u03b9 \u03bc\u03ad\u03c3\u03b1 \u03c3\u03c4\u03b1 20 \u03c4\u03b5\u03bb\u03b5\u03c5\u03c4\u03b1\u03af\u03b1 \u03c7\u03c1\u03cc\u03bd\u03b9\u03b1.<\/p>\n<p>\u0391\u03c5\u03c4\u03ae \u03b7 \u03b1\u03c3\u03c5\u03bd\u03ae\u03b8\u03b9\u03c3\u03c4\u03b7 \u03bb\u03ac\u03bc\u03c8\u03b7 \u03c3\u03c4\u03bf\u03bd \u03b3\u03b1\u03bb\u03b1\u03be\u03b9\u03b1\u03ba\u03cc \u03c0\u03c5\u03c1\u03ae\u03bd\u03b1 \u03c0\u03c1\u03bf\u03ba\u03bb\u03ae\u03b8\u03b7\u03ba\u03b5 \u03c0\u03b9\u03b8\u03b1\u03bd\u03cc\u03c4\u03b1\u03c4\u03b1 \u03b1\u03c0\u03cc \u03c3\u03c4\u03b5\u03bd\u03ad\u03c2 \u00ab\u03c3\u03c5\u03bd\u03b1\u03bd\u03c4\u03ae\u03c3\u03b5\u03b9\u03c2\u00bb \u03c4\u03bf\u03c5 Sgr A * \u03ba\u03b1\u03b9 \u03c4\u03c9\u03bd \u03b1\u03bd\u03c4\u03b9\u03ba\u03b5\u03b9\u03bc\u03ad\u03bd\u03c9\u03bd \u03c0\u03bf\u03c5 \u03c4\u03bf \u03c0\u03b5\u03c1\u03b9\u03b2\u03ac\u03bb\u03bb\u03bf\u03c5\u03bd, \u03c3\u03cd\u03bc\u03c6\u03c9\u03bd\u03b1 \u03bc\u03b5 \u03c4\u03b7\u03bd \u03bf\u03bc\u03ac\u03b4\u03b1.<\/p>\n<p>\u0397 \u03ac\u03ba\u03c1\u03b7 \u03bc\u03b9\u03b1\u03c2 \u03bc\u03b1\u03cd\u03c1\u03b7\u03c2 \u03c4\u03c1\u03cd\u03c0\u03b1\u03c2, \u03c0\u03bf\u03c5 \u03bf\u03bd\u03bf\u03bc\u03ac\u03b6\u03b5\u03c4\u03b1\u03b9 \u00ab\u03bf\u03c1\u03af\u03b6\u03bf\u03bd\u03c4\u03b1\u03c2 \u03b3\u03b5\u03b3\u03bf\u03bd\u03cc\u03c4\u03c9\u03bd\u00bb, \u03b4\u03b9\u03b1\u03bc\u03bf\u03c1\u03c6\u03ce\u03bd\u03b5\u03c4\u03b1\u03b9 \u03b1\u03c0\u03cc \u03ad\u03bd\u03c4\u03bf\u03bd\u03b5\u03c2 \u03c0\u03b1\u03bb\u03b9\u03c1\u03c1\u03bf\u03ca\u03ba\u03ad\u03c2 \u03b4\u03c5\u03bd\u03ac\u03bc\u03b5\u03b9\u03c2 \u03c0\u03bf\u03c5 \u00ab\u03c3\u03ba\u03af\u03b6\u03bf\u03c5\u03bd\u00bb \u03bf\u03c4\u03b9\u03b4\u03ae\u03c0\u03bf\u03c4\u03b5 \u03c0\u03bb\u03b7\u03c3\u03b9\u03ac\u03b6\u03b5\u03b9 \u03c3\u03b5 \u03b1\u03c5\u03c4\u03ae. \u039f \u03bf\u03c1\u03af\u03b6\u03bf\u03bd\u03c4\u03b1\u03c2 \u03b3\u03b5\u03b3\u03bf\u03bd\u03cc\u03c4\u03c9\u03bd&nbsp;(event horizon) \u03b1\u03bd\u03b1\u03c6\u03ad\u03c1\u03b5\u03c4\u03b1\u03b9 \u03c9\u03c2 \u03c4\u03ad\u03c4\u03bf\u03b9\u03bf\u03c2, \u03b4\u03b9\u03cc\u03c4\u03b9 \u03b1\u03bd \u03ba\u03ac\u03c4\u03b9 \u03c3\u03c5\u03bc\u03b2\u03b5\u03af \u03b5\u03bd\u03c4\u03cc\u03c2 \u03c4\u03c9\u03bd \u03bf\u03c1\u03af\u03c9\u03bd \u03c4\u03bf\u03c5, \u03bf\u03b9 \u03c0\u03bb\u03b7\u03c1\u03bf\u03c6\u03bf\u03c1\u03af\u03b5\u03c2 \u03b1\u03c0\u03cc \u03b1\u03c5\u03c4\u03cc \u03c4\u03bf \u03b3\u03b5\u03b3\u03bf\u03bd\u03cc\u03c2 \u03b4\u03b5\u03bd \u03bc\u03c0\u03bf\u03c1\u03bf\u03cd\u03bd \u03bd\u03b1 \u03c6\u03c4\u03ac\u03c3\u03bf\u03c5\u03bd \u03c3\u03b5 \u03ad\u03bd\u03b1 \u03b5\u03be\u03c9\u03c4\u03b5\u03c1\u03b9\u03ba\u03cc \u03c0\u03b1\u03c1\u03b1\u03c4\u03b7\u03c1\u03b7\u03c4\u03ae, \u03ba\u03b1\u03b8\u03b9\u03c3\u03c4\u03ce\u03bd\u03c4\u03b1\u03c2 \u03b1\u03b4\u03cd\u03bd\u03b1\u03c4\u03bf \u03bd\u03b1 \u03c0\u03c1\u03bf\u03c3\u03b4\u03b9\u03bf\u03c1\u03b9\u03c3\u03c4\u03b5\u03af \u03b1\u03bd \u03ba\u03ac\u03c4\u03b9 \u03c4\u03ad\u03c4\u03bf\u03b9\u03bf \u03c3\u03c5\u03bd\u03ad\u03b2\u03b7.<\/p>\n<p>\u039c\u03cc\u03bb\u03b9\u03c2 \u03bc\u03b9\u03b1 \u03bc\u03b1\u03cd\u03c1\u03b7 \u03c4\u03c1\u03cd\u03c0\u03b1 \u03b1\u03c1\u03c7\u03af\u03c3\u03b5\u03b9 \u03bd\u03b1 \u03ba\u03b1\u03c4\u03b1\u03b2\u03c1\u03bf\u03c7\u03b8\u03af\u03b6\u03b5\u03b9 \u03ba\u03bf\u03bd\u03c4\u03b9\u03bd\u03ac \u03b1\u03bd\u03c4\u03b9\u03ba\u03b5\u03af\u03bc\u03b5\u03bd\u03b1 \u03cc\u03c0\u03c9\u03c2 \u03c4\u03b1 \u03b1\u03c3\u03c4\u03ad\u03c1\u03b9\u03b1 \u03ae \u03c4\u03b1 \u03bd\u03b5\u03c6\u03b5\u03bb\u03ce\u03bc\u03b1\u03c4\u03b1, \u03c4\u03b1 \u03b1\u03bd\u03c4\u03b9\u03ba\u03b5\u03af\u03bc\u03b5\u03bd\u03b1 \u03b1\u03c5\u03c4\u03ac \u03b1\u03bd\u03b1\u03c6\u03bb\u03ad\u03b3\u03bf\u03bd\u03c4\u03b1\u03b9 \u03c3\u03c4\u03bf\u03bd \u03bf\u03c1\u03af\u03b6\u03bf\u03bd\u03c4\u03b1 \u03c4\u03b7\u03c2 \u039c\u03b1\u03cd\u03c1\u03b7\u03c2 \u03a4\u03c1\u03cd\u03c0\u03b1\u03c2 \u03c0\u03c1\u03bf\u03ba\u03b1\u03bb\u03ce\u03bd\u03c4\u03b1\u03c2 \u03c6\u03c9\u03c2 \u03c0\u03bf\u03c5 \u03bc\u03c0\u03bf\u03c1\u03b5\u03af \u03bd\u03b1 \u03b5\u03bd\u03c4\u03bf\u03c0\u03b9\u03c3\u03c4\u03b5\u03af \u03b1\u03c0\u03cc \u03c4\u03b1 \u03c4\u03b7\u03bb\u03b5\u03c3\u03ba\u03cc\u03c0\u03b9\u03b1.<\/p>\n<p>\u0391\u03bd\u03b1\u03bb\u03c5\u03c4\u03b9\u03ba\u03cc\u03c4\u03b5\u03c1\u03b1, \u03b7 \u03cd\u03bb\u03b7 \u03c0\u03bf\u03c5 \u03c0\u03ad\u03c6\u03c4\u03b5\u03b9 \u03c3\u03b5 \u03bc\u03b9\u03b1 \u039c\u03b1\u03cd\u03c1\u03b7 \u03a4\u03c1\u03cd\u03c0\u03b1 \u03c3\u03c5\u03b3\u03ba\u03b5\u03bd\u03c4\u03c1\u03ce\u03bd\u03b5\u03c4\u03b1\u03b9 \u03c3\u03b5 \u03ad\u03bd\u03b1 \u03b5\u03be\u03b1\u03b9\u03c1\u03b5\u03c4\u03b9\u03ba\u03ac \u03b8\u03b5\u03c1\u03bc\u03cc \u03ba\u03b1\u03b9 \u03b3\u03c1\u03ae\u03b3\u03bf\u03c1\u03b1 \u03c0\u03b5\u03c1\u03b9\u03c3\u03c4\u03c1\u03b5\u03c6\u03cc\u03bc\u03b5\u03bd\u03bf \u03b4\u03af\u03c3\u03ba\u03bf \u03b3\u03cd\u03c1\u03c9 \u03b1\u03c0\u03cc \u03b1\u03c5\u03c4\u03ae, \u03c0\u03c1\u03b9\u03bd \u03b5\u03b9\u03c3\u03ad\u03bb\u03b8\u03b5\u03b9 \u03b5\u03bd\u03c4\u03cc\u03c2 \u03c4\u03b7\u03c2. O \u03b4\u03af\u03c3\u03ba\u03bf\u03c2 \u03b1\u03c5\u03c4\u03cc\u03c2 \u03b5\u03af\u03bd\u03b1\u03b9 \u03b3\u03bd\u03c9\u03c3\u03c4\u03cc\u03c2 \u03c9\u03c2 \u03b4\u03af\u03c3\u03ba\u03bf\u03c2 \u03c0\u03c1\u03bf\u03c3\u03b1\u03cd\u03be\u03b7\u03c3\u03b7\u03c2. \u0397 \u03c4\u03c1\u03b9\u03b2\u03ae \u03b1\u03bd\u03ac\u03bc\u03b5\u03c3\u03b1 \u03c3\u03b5 \u03b3\u03b5\u03b9\u03c4\u03bf\u03bd\u03b9\u03ba\u03ad\u03c2 \u03b6\u03ce\u03bd\u03b5\u03c2 \u03b1\u03c5\u03c4\u03bf\u03cd \u03c4\u03bf\u03c5 \u03b4\u03af\u03c3\u03ba\u03bf\u03c5 \u03c4\u03bf\u03bd \u03b8\u03b5\u03c1\u03bc\u03b1\u03af\u03bd\u03bf\u03c5\u03bd \u03c4\u03cc\u03c3\u03bf, \u03ce\u03c3\u03c4\u03b5 \u03bd\u03b1 \u03b1\u03ba\u03c4\u03b9\u03bd\u03bf\u03b2\u03bf\u03bb\u03b5\u03af \u03bc\u03b5\u03b3\u03ac\u03bb\u03b7 \u03c0\u03bf\u03c3\u03cc\u03c4\u03b7\u03c4\u03b1 \u03b1\u03ba\u03c4\u03af\u03bd\u03c9\u03bd \u03a7. \u0397 \u03b8\u03ad\u03c1\u03bc\u03b1\u03bd\u03c3\u03b7 \u03b5\u03af\u03bd\u03b1\u03b9 \u03b5\u03be\u03b1\u03b9\u03c1\u03b5\u03c4\u03b9\u03ba\u03ac \u03b1\u03c0\u03bf\u03c4\u03b5\u03bb\u03b5\u03c3\u03bc\u03b1\u03c4\u03b9\u03ba\u03ae \u03ba\u03b1\u03b9 \u03bc\u03c0\u03bf\u03c1\u03b5\u03af \u03bd\u03b1 \u03bc\u03b5\u03c4\u03b1\u03c4\u03c1\u03ad\u03c8\u03b5\u03b9 \u03b1\u03ba\u03cc\u03bc\u03b1 \u03ba\u03b1\u03b9 \u03c4\u03bf 50% \u03c4\u03b7\u03c2 \u03b5\u03bd\u03ad\u03c1\u03b3\u03b5\u03b9\u03b1\u03c2 \u03b5\u03bd\u03cc\u03c2 \u03b1\u03bd\u03c4\u03b9\u03ba\u03b5\u03b9\u03bc\u03ad\u03bd\u03bf\u03c5 \u03c3\u03b5 \u03b1\u03ba\u03c4\u03b9\u03bd\u03bf\u03b2\u03bf\u03bb\u03af\u03b1.<\/p>\n<div class=\"SandboxRoot env-bp-350\" data-twitter-event-id=\"0\">\n<div id=\"twitter-widget-0\" class=\"EmbeddedTweet EmbeddedTweet--cta js-clickToOpenTarget\" lang=\"en\" data-click-to-open-target=\"https:\/\/twitter.com\/quantumpenguin\/status\/1160997637408976896\" data-iframe-title=\"Twitter Tweet\" data-scribe=\"page:tweet\" data-twitter-event-id=\"1\">\n<div class=\"EmbeddedTweet-ancestor EmbeddedTweet-ancestor--repliesRefresh\" data-scribe=\"section:conversation\">\n<blockquote class=\"Tweet Tweet--compact h-entry reply js-tweetIdInfo\" cite=\"https:\/\/twitter.com\/quantumpenguin\/status\/1160368687590727680\" data-tweet-id=\"1160368687590727680\">\n<div class=\"Tweet-ancestorContainer Tweet-ancestorContainer--repliesRefresh\"><a class=\"TweetAuthor-avatar TweetAuthor-avatar--ancestor Identity-avatar u-linkBlend\" href=\"https:\/\/twitter.com\/quantumpenguin\" data-scribe=\"element:user_link\" aria-label=\"Tuan Do (screen name: quantumpenguin)\"><img decoding=\"async\" class=\"Avatar\" src=\"https:\/\/i0.wp.com\/pbs.twimg.com\/profile_images\/513082247948148737\/sa4usRVw_normal.jpeg?w=700&#038;ssl=1\" alt=\"\" data-scribe=\"element:avatar\" data-src-2x=\"https:\/\/pbs.twimg.com\/profile_images\/513082247948148737\/sa4usRVw_bigger.jpeg\" data-src-1x=\"https:\/\/i0.wp.com\/pbs.twimg.com\/profile_images\/513082247948148737\/sa4usRVw_normal.jpeg?w=700&#038;ssl=1\" data-recalc-dims=\"1\"><\/a><\/p>\n<div class=\"Tweet-ancestorContents Tweet-ancestorContents--repliesRefresh\">\n<div class=\"Tweet-header\">\n<div class=\"TweetAuthor js-inViewportScribingTarget TweetAuthor--oneLine\" data-scribe=\"component:author\">\n<div class=\"TweetAuthor-nameScreenNameContainer\"><span class=\"TweetAuthor-decoratedName\"><span class=\"TweetAuthor-name Identity-name customisable-highlight\" title=\"Tuan Do\" data-scribe=\"element:name\">Tuan Do<\/span><\/span><span class=\"TweetAuthor-screenName Identity-screenName\" dir=\"ltr\" title=\"@quantumpenguin\" data-scribe=\"element:screen_name\">@quantumpenguin<\/span><\/div>\n<\/div>\n<div class=\"Tweet-metadata\">&nbsp;\u00b7&nbsp;<a class=\"u-linkBlend u-url permalink customisable-highlight\" href=\"https:\/\/twitter.com\/quantumpenguin\/status\/1160368687590727680\" data-scribe=\"element:mini_timestamp\"><time class=\"dt-updated\" title=\"Time posted: August 11, 2019 01:53:48 (UTC)\" datetime=\"2019-08-11T01:53:48+0000\" aria-label=\"Posted on Aug 11, 2019\">Aug 11, 2019<\/time><\/a><\/div>\n<div class=\"Tweet-brand\">\n<div class=\"Icon Icon--twitter \" title=\"View on Twitter\" role=\"presentation\" aria-label=\"View on Twitter\"><\/div>\n<\/div>\n<\/div>\n<div class=\"Tweet-body e-entry-content\" data-scribe=\"component:tweet\">\n<p class=\"Tweet-text e-entry-title\" dir=\"ltr\" lang=\"en\">Here&#8217;s a timelapse of images over 2.5 hr from May from <a class=\"PrettyLink profile customisable h-card\" dir=\"ltr\" href=\"https:\/\/twitter.com\/keckobservatory\" data-mentioned-user-id=\"229192814\" data-scribe=\"element:mention\"><span class=\"PrettyLink-prefix\">@<\/span><span class=\"PrettyLink-value\">keckobservatory<\/span><\/a> of the supermassive black hole Sgr A*. The black hole is always variable, but this was the brightest we&#8217;ve seen in the infrared so far. It was probably even brighter before we started observing that night!<\/p>\n<div class=\"Tweet-card\">\n<article class=\"MediaCard\n\n           cards-multimedia\n           customisable-border\" dir=\"ltr\" data-scribe=\"component:card\"><\/p>\n<div class=\"MediaCard-media\">\n<div class=\"MediaCard-widthConstraint js-cspForcedStyle\" data-style=\"max-width: 2000px\">\n<div class=\"MediaCard-mediaContainer MediaCard--roundedTop MediaCard--roundedBottom js-cspForcedStyle\" data-style=\"padding-bottom: 100.0000%\">\n<div class=\"NaturalImage-ctaOverlay PlayButton PlayButton--centered\" data-scribe=\"element:play_button\">\n<div class=\"Icon Icon--playCircle \" title=\"Play Media\" role=\"img\" aria-label=\"Play Media\"><\/div>\n<\/div>\n<p><a class=\"MediaCard-mediaAsset MediaCard-mediaPlaceholder NaturalImage NaturalImage--fill js-playableMediaInterstitial\" href=\"https:\/\/twitter.com\/quantumpenguin\/status\/1160368687590727680\"><img decoding=\"async\" class=\"NaturalImage-image\" src=\"https:\/\/pbs.twimg.com\/tweet_video_thumb\/EBp1Jc6UYAEGQDq?format=jpg&amp;name=small\" alt=\"Embedded video\" data-image=\"https:\/\/pbs.twimg.com\/tweet_video_thumb\/EBp1Jc6UYAEGQDq\" data-scribe=\"element:poster_image\"><\/a><\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/article>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/blockquote>\n<\/div>\n<div class=\"EmbeddedTweet-tweetContainer\">\n<div class=\"EmbeddedTweet-tweet\">\n<blockquote class=\"Tweet h-entry js-tweetIdInfo subject expanded\" cite=\"https:\/\/twitter.com\/quantumpenguin\/status\/1160997637408976896\" data-tweet-id=\"1160997637408976896\" data-scribe=\"section:subject\">\n<div class=\"Tweet-header\"><a class=\"TweetAuthor-avatar  Identity-avatar u-linkBlend\" href=\"https:\/\/twitter.com\/quantumpenguin\" data-scribe=\"element:user_link\" aria-label=\"Tuan Do (screen name: quantumpenguin)\"><img decoding=\"async\" class=\"Avatar\" src=\"https:\/\/i0.wp.com\/pbs.twimg.com\/profile_images\/513082247948148737\/sa4usRVw_normal.jpeg?w=700&#038;ssl=1\" alt=\"\" data-scribe=\"element:avatar\" data-src-2x=\"https:\/\/pbs.twimg.com\/profile_images\/513082247948148737\/sa4usRVw_bigger.jpeg\" data-src-1x=\"https:\/\/i0.wp.com\/pbs.twimg.com\/profile_images\/513082247948148737\/sa4usRVw_normal.jpeg?w=700&#038;ssl=1\" data-recalc-dims=\"1\"><\/a><\/p>\n<div class=\"TweetAuthor js-inViewportScribingTarget\" data-scribe=\"component:author\">\n<div class=\"TweetAuthor-nameScreenNameContainer\"><span class=\"TweetAuthor-decoratedName\"><span class=\"TweetAuthor-name Identity-name customisable-highlight\" title=\"Tuan Do\" data-scribe=\"element:name\">Tuan Do<\/span><\/span><span class=\"TweetAuthor-screenName Identity-screenName\" dir=\"ltr\" title=\"@quantumpenguin\" data-scribe=\"element:screen_name\">@quantumpenguin<\/span><\/div>\n<\/div>\n<\/div>\n<div class=\"Tweet-body e-entry-content\" data-scribe=\"component:tweet\">\n<div class=\"Tweet-target js-inViewportScribingTarget\"><\/div>\n<p class=\"Tweet-text e-entry-title\" dir=\"ltr\" lang=\"en\">For those who are interested in the details of our observations of Sgr A* this year (including this one), see our recently accepted paper in Astrophysical Journal Letters. Read the pre-print of the paper here: <a class=\"link customisable\" dir=\"ltr\" title=\"https:\/\/arxiv.org\/abs\/1908.01777\" href=\"https:\/\/t.co\/cqqinNSKxK\" target=\"_blank\" rel=\"nofollow noopener noreferrer\" data-expanded-url=\"https:\/\/arxiv.org\/abs\/1908.01777\" data-scribe=\"element:url\"><span class=\"u-hiddenVisually\">https:\/\/<\/span>arxiv.org\/abs\/1908.01777<span class=\"u-hiddenVisually\">&nbsp;<\/span><\/a><\/p>\n<div class=\"TweetInfo\">\n<div class=\"TweetInfo-like\">\n<div data-scribe=\"element:heart\">\n<div class=\"Icon Icon--heart \" title=\"Like\" role=\"img\" aria-label=\"Like\"><\/div>\n<\/div>\n<p><a class=\"TweetInfo-heart\" title=\"Like\" href=\"https:\/\/twitter.com\/intent\/like?tweet_id=1160997637408976896\" data-scribe=\"component:actions\"><span class=\"TweetInfo-heartStat\" data-scribe=\"element:heart_count\">267<\/span><\/a><\/p>\n<\/div>\n<div class=\"TweetInfo-timeGeo\"><a class=\"u-linkBlend u-url customisable-highlight long-permalink\" href=\"https:\/\/twitter.com\/quantumpenguin\/status\/1160997637408976896\" data-datetime=\"2019-08-12T19:33:01+0000\" data-scribe=\"element:full_timestamp\"><time class=\"dt-updated\" title=\"Time posted: August 12, 2019 19:33:01 (UTC)\" datetime=\"2019-08-12T19:33:01+0000\">10:33 PM &#8211; Aug 12, 2019<\/time><\/a><\/div>\n<div class=\"tweet-InformationCircle\" data-scribe=\"element:notice\"><a class=\"Icon Icon--informationCircleWhite js-inViewportScribingTarget\" title=\"Twitter Ads info and privacy\" href=\"https:\/\/support.twitter.com\/articles\/20175256\"><span class=\"u-hiddenVisually\">Twitter Ads info and privacy<\/span><\/a><\/div>\n<\/div>\n<\/div>\n<\/blockquote>\n<\/div>\n<div class=\"CallToAction-icon\" data-scribe=\"element:conversation_icon\">\n<div class=\"Icon Icon--replyCTA \" title=\"View conversation on Twitter\" role=\"img\" aria-label=\"View conversation on Twitter\"><\/div>\n<\/div>\n<div class=\"CallToAction-text\" data-scribe=\"element:conversation_text\">73 people are talking about this<\/div>\n<div class=\"CallToAction-chevron\" data-scribe=\"element:cta_chevron\">\n<div class=\"Icon Icon--chevronRightCTA \" title=\"View on Twitter\" role=\"img\" aria-label=\"View on Twitter\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"resize-sensor\">\n<div class=\"resize-sensor-expand\">\n<div><\/div>\n<\/div>\n<\/div>\n<\/div>\n<p>\u039f\u03b9 \u03b5\u03c0\u03b9\u03c3\u03c4\u03ae\u03bc\u03bf\u03bd\u03b5\u03c2 \u03bb\u03ad\u03bd\u03b5 \u03c4\u03ce\u03c1\u03b1 \u03cc\u03c4\u03b9 \u03bf\u03bb\u03cc\u03ba\u03bb\u03b7\u03c1\u03bf \u03c4\u03bf \u03c6\u03b1\u03b9\u03bd\u03cc\u03bc\u03b5\u03bd\u03bf \u03b4\u03b9\u03ae\u03c1\u03ba\u03b5\u03c3\u03b5 \u03bc\u03cc\u03bb\u03b9\u03c2 2,5 \u03ce\u03c1\u03b5\u03c2, \u03b8\u03b5\u03c9\u03c1\u03ce\u03bd\u03c4\u03b1\u03c2 \u03cc\u03c4\u03b9 \u03b7 \u03b5\u03c0\u03af\u03b4\u03c1\u03b1\u03c3\u03b7 \u03bc\u03c0\u03bf\u03c1\u03b5\u03af \u03bd\u03b1 \u03b5\u03af\u03bd\u03b1\u03b9 \u03bc\u03b9\u03b1 \u03ba\u03b1\u03b8\u03c5\u03c3\u03c4\u03b5\u03c1\u03b7\u03bc\u03ad\u03bd\u03b7 \u03b1\u03bd\u03c4\u03af\u03b4\u03c1\u03b1\u03c3\u03b7 \u03c3\u03c4\u03bf \u03c3\u03c4\u03b5\u03bd\u03cc \u03c0\u03ad\u03c1\u03b1\u03c3\u03bc\u03b1 \u03c4\u03bf\u03c5 \u03b1\u03c3\u03c4\u03ad\u03c1\u03b1 S0-2 \u03c4\u03bf 2018, \u03ae \u03c4\u03bf \u03bd\u03ad\u03c6\u03bf\u03c2 \u03c3\u03ba\u03cc\u03bd\u03b7\u03c2 G2 \u03c0\u03bf\u03c5 \u03c0\u03bb\u03b7\u03c3\u03af\u03b1\u03c3\u03b5 \u03c4\u03b7 \u03bc\u03b1\u03cd\u03c1\u03b7 \u03c4\u03c1\u03cd\u03c0\u03b1 \u03c4\u03bf 2014.<\/p>\n<p>\u0397 \u03bf\u03bc\u03ac\u03b4\u03b1 \u03c0\u03b5\u03c1\u03b9\u03bc\u03ad\u03bd\u03b5\u03b9 \u03c4\u03ce\u03c1\u03b1 \u03c4\u03b1 \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03b1 \u03b1\u03c0\u03cc \u03ac\u03bb\u03bb\u03b1 \u03c4\u03b7\u03bb\u03b5\u03c3\u03ba\u03cc\u03c0\u03b9\u03b1, \u03c3\u03c5\u03bc\u03c0\u03b5\u03c1\u03b9\u03bb\u03b1\u03bc\u03b2\u03b1\u03bd\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd \u03c4\u03c9\u03bd Spitzer \u03ba\u03b1\u03b9 Chandra \u03c4\u03b7\u03c2 NASA, \u03b3\u03b9\u03b1 \u03bd\u03b1 \u03ba\u03b1\u03c4\u03b1\u03bd\u03bf\u03ae\u03c3\u03b5\u03b9 \u03ba\u03b1\u03bb\u03cd\u03c4\u03b5\u03c1\u03b1 \u03c4\u03b9 \u03c3\u03c5\u03bd\u03ad\u03b2\u03b7 \u03b1\u03ba\u03c1\u03b9\u03b2\u03ce\u03c2 \u03c3\u03c4\u03bf\u03bd \u03c0\u03c5\u03c1\u03ae\u03bd\u03b1 \u03c4\u03bf\u03c5 \u03b3\u03b1\u03bb\u03b1\u03be\u03af\u03b1 \u03bc\u03b1\u03c2. \u0395\u03c0\u03af\u03c3\u03b7\u03c2, \u03b1\u03bd\u03b1\u03bc\u03ad\u03bd\u03b5\u03c4\u03b1\u03b9 \u03bd\u03b1 \u03c0\u03c1\u03bf\u03b2\u03b5\u03af \u03c4\u03b9\u03c2 \u03b5\u03c0\u03cc\u03bc\u03b5\u03bd\u03b5\u03c2 \u03ce\u03c1\u03b5\u03c2 \u03c3\u03b5 \u03bd\u03ad\u03b1 \u03c0\u03b1\u03c1\u03b1\u03c4\u03ae\u03c1\u03b7\u03c3\u03b7.<\/p>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"footnotes":"","_jetpack_memberships_contains_paid_content":false,"jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","enabled":false}}},"categories":[33],"tags":[],"jetpack_publicize_connections":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\u039c\u03b1\u03cd\u03c1\u03b7 \u03a4\u03c1\u03cd\u03c0\u03b1 \u03c3\u03c4\u03bf \u03ba\u03ad\u03bd\u03c4\u03c1\u03bf \u03c4\u03bf\u03c5 \u0393\u03b1\u03bb\u03b1\u03be\u03af\u03b1 \u03bc\u03b1\u03c2 \u03ac\u03c1\u03c7\u03b9\u03c3\u03b5 \u03bd\u03b1 \u03b5\u03ba\u03c0\u03ad\u03bc\u03c0\u03b5\u03b9\u2026 \u03c6\u03c9\u03c2 &#8211; 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