Why did Hubble think the Cepheid variables he saw in "Fuzzy Patches" were outside the milky way?
A) They were dim.
B) They were small.
C) Their brightness varied.
D) They had a red shift character.
Correct Answer:
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Q11: A Hertzsprung-Russell diagram (H-R Diagram)is a plot
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Q14: Fluorescence occurs when _.
A)visible light is converted
Q15: A red star is _ our Sun.
A)hotter
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A)emission nebulae
B)dark
Q20: Cepheid Variables are stars whose brightness varies
Q21: What is the dominant factor in the
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