Question

what are the factors affecting brilliance of stars​

Answer 1

the age of the star because just like people as they grow older they become weak and so arr the stars their brilliance fade when they become older.

Answer 2

The intrinsic properties of stars include brightness, color, temperature, mass, and size. Three factors control the brightness of a star as seen from Earth: how big it is, how hot it is, and how far away it is.