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This ferocious heart of brilliant hot gas is called a quasar. Scientists thought this whirling mass might be caused by a giant black hole sucking up gas and stars, literally feeding on the center of a
超大质量黑洞
[00:05.62]34) Ancient Quasar [00:11.96]Astronomers have discovered what they say is one of the earliest known structures ever to form in the universe. [00:20.82]It is a star-like object called a quasar. [00:24.76]Quasars are very large. [00:27.69]The
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Silk realized that the energy from this newly formed quasar would create intense temperature changes in the surrounding gas. This would cause the gas around the black hole and its newly formed quasar
超大质量黑洞
Which came first, black holes or galaxies? Its been a bit of a conundrum for astrophysicists. Black holes are known to devour matter, but did they arise before or after, the galaxies in which they exist? Now, scientists say it looks like the black ho
Scientific American(十二)月
Black Hole Quasar Building Galaxy A study in the journal Astronomy Astrophysics finds that a distant quasar, powered by a black hole, is building a galaxy that will eventually surround the black hole. Cynthia Graber reports Which came first, black ho
60秒科学
Showcasing interesting and innovative online destinations Art Chimes | Washington, DC 04 December 2009 It fades in and out. ... But what I think that does is that adds a feeling of mystery. Time again for our Website of the Week, when we showcase int
VOA标准英语2009年(十二月)