ASTRONOMY: Which is not an example of a standard candle?
1. Supergiants
2. Supernovae
3. The brightest galaxy in a cluster
4. pulsars
5. Cepheids

I would lean towards either the supergiant or the brightest galaxy, but I'm not sure. Thoughts?

Question

ASTRONOMY: Which is not an example of a standard candle? 
1. Supergiants
2. Supernovae
3. The brightest galaxy in a cluster
4. pulsars
5. Cepheids

I would lean towards either the supergiant or the brightest galaxy, but I'm not sure. Thoughts?

anonymous · Answer

A standard candle is a class of astrophysical objects, such as supernovae or variable stars, which have known luminosity due to some characteristic quality 
says google
so option 1. i think this is new to me