What's the best way to measure the expansion of the Universe?
Daniel and Kelly’s Extraordinary Universe
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How to Measure the Universe
How do you use the universe to measure the universe? That is a pretty tricky question because we're just floating on this tiny rock called Earth in a little corner of a galaxy. It's almost like they are magicians. And astronomers are really clever as I was reading some recent papers about how to measure how far away things are.
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