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.
Magnitude is described as 'range or amount.' in basic terms. It depicts the absolute or relative direction or size in which an object moves in the sensation of motion.
A star's brightness is measured in terms of apparent magnitude, which is how brighter the star appears from a distance (i.e not real brightness).
A star may appear 10 times brighter from afar, but its true brightness is far lower; this is referred to as magnitude.
While the luminosity of the star is the true brightness of the star as measured from its position in the universe.
Thus luminous can be the stellar property referred to above.
For more information about luminosity refer to the link:
https://brainly.com/question/14140223
