Oral Final - CH 24 What was the Shapley-Curtis debate all...

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CH. 24 What was the Shapley-Curtis debate all about? Was a winner declared at the end of the debate? Whose ideas turned out to be correct? Shapley argued that spiral nebulae were small, nearby objects scattered around our Galaxy like the globular clusters. Curtis argued that they were each a rotating system of stars like our own Galaxy. Since neither of them was able to provide conclusive evidence, nothing was decided. Are any galaxies besides our own visible to the naked eye from Earth? If so, which ones(s)? Under good observing conditions, we can actually see Andromeda's central bulge with naked eye. What is the Hubble law? How can it be used to determine distances? Hubble Law states that there is a simple linear relationship between the distance from the Earth to a remote galaxy and the redshift of that galaxy (speed). Some galaxies in the Local Group exhibit blueshifted spectral lines. Why aren’t these blueshifts violations of the Hubble law? CH. 25
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This note was uploaded on 08/25/2008 for the course ASTRON 1 taught by Professor Jsepikas during the Winter '07 term at Pasadena City College.

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Oral Final - CH 24 What was the Shapley-Curtis debate all...

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