REPORT ABUSIVE REPLY
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Message Subject
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Calling All Amateur Astronomers! How far away are stars? How do we determine this distance? What makes it reliable?
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Poster Handle
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Mack |
Post Content
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look up "Cepheid Variable" stars. They are used to measure distances of millions of light years. You may also start a first year astronomy textbook; the internet is so distracting that focusing on a book is the best way to actually get a grip on basic astronomy.
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