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drew911811 drew911811
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A month ago

Cluster



What is the approximate age of the star cluster in the H-R diagram? (Hint: Main sequence stars of spectral types O and B have a core supply of hydrogen that is sufficient to last about 250 million years; types A and F, about 2 billion years; type G about 10 billion years; types K and M about 30 billion years. The apparent magnitude scale means that larger numbers are toward the bottom of the vertical axis.)



200 million years



2 billion years



10 billion years



30 billion years

Textbook 
ASTRO

ASTRO


Edition: 3rd
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mavrik8511mavrik8511
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A month ago
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