Chapter 19, Problem 24Q

To determine

The evolutionary tracks of the stars mentioned in the table below on the H-R diagram along with their masses and main sequence lifetimes as well as also determine the stars that will remain on the main-sequence after ${10}^9\text{ years}$ and ${10}^{11}\text{ years}$.

Mass (${\text{M}}_{\odot }$)	Surface Temperature (K)	Spectral class	Luminosity (${\text{L}}_{\odot }$)	Main-sequence lifetime (${10}^6$ years)
$25$	$35000$	O	$80000$	$4$
$15$	$30000$	B	$10000$	15
$3$	$11000$	A	$60$	$800$
$1.5$	$7000$	F	$5$	$4500$
$1.0$	$6000$	G	$1$	$12000$
$0.75$	$5000$	K	$0.5$	$25000$
$0.50$	$4000$	M	$0.03$	$700000$