When you see an image taken by a space telescope, you are looking into the past, but how far? 

Light travels fast, so fast that when we see something we are looking into the past. On earth that's not very far into the past, but when you see images taken by the Hubble Space Telescope, or the James Webb Space Telescope you are looking way into the past, but how far?

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February 10, 2022

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Smithsonian's National Air and Space Museum

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