Suppose you want to know the distance to a particular galaxy.What's the biggest problem with using type 1a supernovae to measure the distance?
A)Supernovae are extremely luminous and can outshine their galaxies.
B)Supernovae all have about the same luminosity.
C)Because supernovae are very energetic, they are not well understood.
D)Supernovae are rare, so you might have to wait a long time.

Question

Quizplus · Accepted Answer

Type 1a supernovae are rare events, so it might take a long time for one to occur in the galaxy you are interested in, making it difficult to use them for distance measurement.

Suppose You Want to Know the Distance to a Particular