Which distance indicator technique is best to find distances to galaxies
A)Cepheid variables
B)radar
C)small-angle formula
D)magnitude-distance formula

Question

Quizplus · Accepted Answer

Cepheid variables have been extensively used as distance indicators in astronomy because their variability period is directly related to their intrinsic luminosity. This relationship allows us to determine how far away the Cepheid variable is from its period of variability, making it a reliable technique for finding distances to galaxies. Other techniques such as radar, small-angle formula, and magnitude-distance formula are not suitable for finding distances to galaxies.

Which Distance Indicator Technique Is Best to Find Distances to Galaxies