Cepheid and RR Lyrae variable stars change their brightness by ____.
A) atmospheric explosions of hydrogen gas
B) internal changes in their fusion processes
C) a combination of atmospheric explosions and internal changes
D) a combination of atmospheric explosions and physically pulsating
E) changing its period between pulses

Question

Quizplus · Accepted Answer

The Answer of Cepheid and RR Lyrae variable stars change their brightness by ____.
A) atmospheric explosions of hydrogen gas
B) internal changes in their fusion processes
C) a combination of atmospheric explosions and internal changes
D) a combination of atmospheric explosions and physically pulsating
E) changing its period between pulses

Cepheid and RR Lyrae Variable Stars Change Their Brightness by ____