Pulsating variable stars are useful in determining
A)the mass of a star for which the distance is known.
B)the temperature of a star for which we know the luminosity.
C)the radius of the bulge of our galaxy.
D)the distance to globular clusters.
E)the mass of the Milky Way galaxy.

Question

Quizplus · Accepted Answer

Pulsating variable stars, such as Cepheid variables and RR Lyrae stars, have a relationship between their period of pulsation and their intrinsic brightness. This makes them useful as standard candles for determining distances, particularly to globular clusters in our galaxy and other galaxies.

Pulsating Variable Stars Are Useful in Determining