Time. I wish I had more of it.
Answer:
The outer layer of the star expands
Explanation:
Late in life, when the hydrogen fuel for nuclear fusion is exhausted, the core of the star tends to collapse. That process generates heat that pushes the outer layers of the star outward.
The outer layer of the star expands.
Answer:
4
Explanation:
Proxima Centauri is about 4.22 light-years from Earth and is the closest star other then the sun
