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21 November, 07:43

Explain the current theory of what a quasar is and where quasars can be found.

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  1. 21 November, 08:13
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    Current understanding

    It is now known that quasars are distant but extremely luminous objects, so any light which reaches the Earth is redshifted due to the metric expansion of space ... Light and other radiation cannot escape from within the event horizon of a black hole.
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