The chemical composition of a star's atmosphere tells us
A) how much nuclear burning has gone on in the star.
B) the star's evolutionary stage.
C) how many planets have fallen onto the star in its lifetime.
D) the chemical composition of the cloud from which the star formed.
E) the number of heavy elements the entire galaxy had when the star was formed.
Correct Answer:
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Q12: Any single star in the Milky Way
Q13: Somebody shows you the picture in the
Q14: Halo stars near the Sun are distinguished
Q15: Spiral arms are generated by
A) bipolar jets
Q16: Studying standard candles in globular clusters offered
Q18: In a star that has heavy-element abundance
Q19: The Milky Way appears as _ in
Q20: Globular clusters, when compared with open clusters,
Q21: X-ray observations indicate that around the Milky
Q22: Compared to the Sun's stellar neighborhood, globular
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