In the late 18th century, two astronomers, both with the last name of _______________, were the first to attempt to map the shape of the galaxy.
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Q63: Discuss the evidence that supports the theory
Q64: Stars at different distances from the galactic
Q65: Sgr A* has been heavily studied using
Q66: Why was it difficult for astronomers to
Q67: An astronomer named _ used globular clusters
Q68: Why are Cepheid variables so important to
Q69: Explain the reasoning that leads astronomers to
Q71: Why do stars in the central bulge
Q72: The galactic _ contains very little gas
Q73: Explain how giant molecular clouds give rise
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