Browsing the "Stephen Hawking" Tag

Astronomers Discover Most Distant and Ancient Quasar, and a Cosmic Puzzle

July 4th, 2011 | by Michael Ricciardi

Astronomers have detected a quasar 60 trillion times brighter than our Sun -- and its the most distant such "quasi-stellar radio source" ever detected, which makes it the oldest too. The source of its incredible brightness is believed to be a super massive black hole at the center of a galaxy that emits massive, brilliant bursts, or "jets", of light and energetic particles as it sucks in stellar material. But finding such a supermassive object poses a direct challenge to current theories of how such black holes are formed

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