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发帖数: 1994 | 1 A Primordial Quasar
Drawing Credit: Wolfram Freudling et al. (STECF), ESO, ESA, NASA
Explanation: What did the first quasars look like? The nearest quasars are now known to be
supermassive black holes in the centers of galaxies. Gas and dust that falls toward a quasar
glows brightly, sometimes outglowing the entire home galaxy. The quasars that formed in the
first billion years of the universe are more mysterious, though, with even the nature of the
surrounding gas still unknown. Above, a |
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