Suppose an elliptical galaxy is so far away that we cannot see even its brightest stars individually.Which of the following techniques might allow us to measure its distance?
A)We could use parallax.
B)We could use Cepheid variables as standard candles.
C)We could use a white dwarf supernova as a standard candle.
D)We could use radar ranging.

Question

Quizplus · Accepted Answer

Cepheid variables and parallax require the ability to resolve individual stars, which is not possible in the scenario described. Radar ranging is not practical for distances beyond the Solar System. However, a white dwarf supernova, being extremely bright, can serve as a standard candle even for very distant galaxies, allowing for the measurement of distance without the need to resolve individual stars.

Suppose an Elliptical Galaxy Is So Far Away That We