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doit_the_clown doit_the_clown
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7 years ago
What is the best way to estimate the age of a star cluster?
A)   Plot the stars on a Hertzsprung-Russell diagram and see which stars are still on the main sequence.
B)   Measure the motions of the stars in the cluster and compare to theoretical models.
C)   Measure the heavy-element abundance for the stars in the cluster.
D)   Count the number of T Tauri stars in the cluster.
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Discovering the Universe

Discovering the Universe


Edition: 7th
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Only two things are infinite, the universe and human stupidity, and I'm not sure about the former.

Albert Einstein
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hyponoticahyponotica
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7 years ago
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doit_the_clown Author
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7 years ago
Thanks
mmmm_dat_userna
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Brilliant ツ
rhockeygirl
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2 hours ago
Correct Slight Smile TY
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