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How does looking at distant galaxies allow us to look back in time? | Science Questions with Surprising Answers
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An Astronaut Looks Through A Telescope At Earth. Stock Photo, Picture And Royalty Free Image. Image 121844482.
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What to Expect When You Look Through a Telescope…and Why You Shouldn't be Disappointed : What to Expect When You Look Through a Telescope…and Why You Shouldn't be Disappointed
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