how does a telescope see in the dark
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Just because a telescope is normally used during evening hours doesn't mean you have to set it up in the dark!
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The Hubble Space Telescope can see objects even more distant than your eyes can. When it takes a picture of a galaxy 100 million light years away, we are seeing the galaxy as it looked 100 million years ago. At the time that light left that galaxy, dinosaurs still roamed Earth and humans would not appear for many millions of years!Because distant galaxies appear to us as they were millions or even billions of years ago, we can study how they change over time.
By looking at distant galaxies, we see what they looked like when the universe was much younger, as galaxies were first forming. As we look at closer and closer galaxies we see how they change as they age, just as looking at babies, children, teenagers, and then adults can show how we humans change as we age.
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