Question

question 23
which of the following does not affect the apparent brightness of a star?
how old the star is
how big the star is
how hot the star is
how far away the star is

Explanation:

The apparent brightness of a star is determined by its size (bigger stars can emit more light), temperature (hotter stars emit more energy), and distance (closer stars appear brighter). The age of a star does not directly affect its apparent brightness. For example, a young hot blue star and an old hot blue star of the same size and distance would have similar apparent brightness.

Answer:

how old the star is