Author Question: Which of the following happens when a star runs out of hydrogen at its center? A) The core of the ... (Read 51 times)

maegan_martin · **on:** Jul 27, 2018

Which of the following happens when a star runs out of hydrogen at its center?

A) The core of the star expands.
B) The outer layers of the star heat up.
C) The star moves toward the lower left in the Hertzsprung-Russell diagram.
D) The stellar core becomes almost pure helium

Question 2

Simple physics predicts that neutron stars should:

A) spin very slowly.
B) be very cool.
C) have a radius of more than 100 km.
D) have strong magnetic fields.