What distance method did Edwin Hubble use to determine the distance to local galaxies?
A) Hubble Law
B) supernova observations
C) period-luminosity relationship of variable stars
D) parallax

Question

Quizplus · Accepted Answer

Edwin Hubble used the period-luminosity relationship of variable stars, specifically Cepheid variables, to determine the distances to nearby galaxies. This method is based on the fact that the period of a Cepheid variable star is directly related to its intrinsic luminosity, allowing astronomers to calculate its distance based on its observed brightness.

What Distance Method Did Edwin Hubble Use to Determine the Distance