Standard candles, which are important for finding distances to remote galaxies, are
A) stars and other objects of known intrinsic brightness.
B) standard laboratory light sources with which the brightness of a galaxy can be compared.
C) standard bars of known length with which the size of a galaxy can be measured.
D) heat sources used for calibrating infrared observations of galaxies.

Question

Quizplus · Accepted Answer

Standard candles are stars or other astronomical objects with known intrinsic brightness. By comparing their known brightness with how bright they appear from Earth, astronomers can calculate their distance from us.

Standard Candles, Which Are Important for Finding Distances to Remote