Suppose we observe a Cepheid variable in a distant galaxy that brightens and dims with a regular period of about 10 days. What can we learn from this observation?
1 Answer
Feb 29, 2016
The period of a variable and its luminosity have relation.
Explanation:
This is used to find distance to stars.these types of stars![enter image source here] this type of stars are used as standard candles to find )
l
Hyperphysics.edu.org. Picture credit.
