-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.)
A)200 million years
B)2 billion years
C)10 billion years
D)30 billion years

Question

-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.)
A)200 million years 
B)2 billion years 
C)10 billion years 
D)30 billion years

Quizplus · Accepted Answer

The Answer of 
-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.)
A)200 million years 
B)2 billion years 
C)10 billion years 
D)30 billion years

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