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doit_the_clown doit_the_clown
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7 years ago
The optical luminosity of a quasar or the nucleus of an active galaxy is believed by many astronomers to arise from

(a)   gases heated by rotational friction in an accretion disk around a supermassive black hole.
(b)   gases that gain tremendous amounts of energy and heat as they fall toward and eventually through the event horizon of a supermassive black hole.
(c)   gases that are heated as they are ejected in jets from an accretion disk around a supermassive black hole.
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Discovering the Universe

Discovering the Universe


Edition: 7th
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Only two things are infinite, the universe and human stupidity, and I'm not sure about the former.

Albert Einstein
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discovererdiscoverer
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7 years ago
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doit_the_clown Author
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7 years ago
Good timing, thanks!
einstein
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Yesterday
Thank you, thank you, thank you!
cartoon
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2 hours ago
Brilliant ツ
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