Question

Two stars have the same color, but differ by 5 magnitudes in absolute magnitude. What stellar property must be different in the two objects and by how much?

Answer 1

Answer:

The property that must be different in both stars is their luminous.

One must be 100 times as luminous as the other

Explanation:

The brightness of a star is measured in terms of apparent magnitude i.e. how bright the star appears from distant (i.e not real brightness). A star may appear 10x bright from afar but it's real brightness is not up to that, this term is referred to as magnitude. While the luminosity of the star is the star's true brightness measured from its place in the universe.

In astronomy, five magnitudes' difference is defined as having a brightness ratio of 100.