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A look at the stars is actually a look back in time. So, if we look through a telescope at an object which is 65 million light-years away, we are seeing it now as it was when dinosaurs roamed the Earth. Expanding that, if we see a quasar, which averages a distance of 13 billion light-years, we are looking at an object as it appeared before Earth existed.
Guru Spotlight |
Kristle Jones |