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Home Q & A Board Science-Related Homework Help Physics
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staedtler staedtler
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7 years ago
The main general features that make clusters of stars useful to astronomers are that
A)   the stars all have the same apparent magnitude, the same surface temperatures, and the same sizes.
B)   the stars are all at the same distance from the Earth, have the same surface temperature, and joined the cluster at various times.
C)   the stars all have the same intrinsic brightness but differ only in size and surface temperature.
D)   the stars are at the same distance from the Earth, were formed at approximately the same time, and were made from the same chemical mix.
Textbook 
Discovering the Universe

Discovering the Universe


Edition: 7th
Authors:
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hyponoticahyponotica
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staedtler Author
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7 years ago
I really appreciate your help!
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