What is the most accurate way to determine the distance to a very distant irregular galaxy?
A)using Cepheid variables
B)using a white-dwarf supernova as a standard candle
C)main sequence fitting
D)Hubble's law

Question

Quizplus · Accepted Answer

Using a white-dwarf supernova as a standard candle is the most accurate way to determine the distance to a very distant irregular galaxy. This is because these supernovae have a known luminosity and are bright enough to be seen across very large distances. Cepheid variables can also be used but are not as accurate for very distant galaxies. Main sequence fitting and Hubble's law are not as accurate for irregular galaxies since they do not have a well-defined structure.

What Is the Most Accurate Way to Determine the Distance