Dusty galaxy

Dusty galaxy

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Caption: Dusty galaxy. Computer artwork of a dusty galaxy similar to several imaged by NASA's Spitzer Space Telescope. The dust hides such galaxies from optical telescopes but not from infrared telescopes. The galaxies are very distant, approximately 11 billion light years away, and therefore what we see of them is very ancient. The galaxies are many trillion times brighter than stars and are thought to be dusty quasars. Quasars are very bright galaxies centred around a supermassive black hole. It is not known where the dust comes from.

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Keywords: ancient, artwork, astronomical, astronomy, astrophysical, astrophysics, computer artwork, cosmology, distant, dust, galaxy, illustration, quasar, quasi stellar object, quasi stellar radio source, science, space, supermassive black hole

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