What Is the Approximate Age of the Star Cluster in the H-R

question 17

Multiple Choice

What is the approximate age of the star cluster in the H-R diagram below? Hint: Main-sequence stars of spectral types between A and B have core supplies of hydrogen sufficient to last about 250 million years, between A and F about 2 billion years, type G about 10 billion years, and between K and M about 30 billion years.

• A) 200 million years
• B) 2 billion years
• C) 10 billion years
• D) 30 billion years
• E) The age of the cluster cannot be estimated from an H-R diagram of the cluster.

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