Question

two stars are the same distance from us. what can you use to determine which star is brighter?
A.)parallax
B.) absolute magnitude or apparent magnitude
C.) only apparent magnitude

Answer 1

Hi!

The correct answer is B.

Explanation

Astronomers use both apparent magnitude and absolute magnitude to define how bright a star is. By way of apparent magnitude, astronomers gauge how bright the star seems from the Earth, and b way of absolute magnitude, astronomers gauge how bright the star seems from 10 parsecs/32.6 light years which is a set standard distance.

Hope this helps