A comparison of an elliptical galaxy and a spiral galaxy of the same mass a billion years after both began formation would show that
A) they should each have about the same number of stars.
B) the elliptical galaxy will have formed more stars than the spiral galaxy.
C) the spiral galaxy will have formed more stars than the elliptical.
D) neither galaxy will have formed any stars during the first billion years.

Question

Quizplus · Accepted Answer

Elliptical galaxies tend to form stars more rapidly in their early stages compared to spiral galaxies. This is because elliptical galaxies often experience a phase of rapid star formation, using up much of their gas in the process. As a result, a billion years after their formation, an elliptical galaxy of the same mass as a spiral galaxy would typically have formed more stars.

A Comparison of an Elliptical Galaxy and a Spiral Galaxy