What is a "pulsating star"?
A) a rotating neutron star that emits radio waves in a narrow beam
B) a star whose luminosity changes as it regularly expands and contracts
C) a planetary nebula
D) a star whose mass changes as it comes into contact with another star

Question

Quizplus · Accepted Answer

A pulsating star is one whose luminosity changes due to regular expansion and contraction, causing variations in brightness.

What Is a "Pulsating Star