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.

Question

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.

Quizplus · Accepted Answer

The Answer of 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.

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