Kshitij  Gupta

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One of the most distant (known) objects in the universe is not a quasar but an ordinary galaxy, whose feeble light has been magnified significantly by the action of an intervening gravitational lens. We may henceforth need to rely upon these “intergalactic” telescopes to peer where (and when) ordinary telescopes cannot reach, and thus reveal the future holders of the cosmic distance record.
Astrophysics for People in a Hurry (Astrophysics for People in a Hurry Series)
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