A red giant reaches its largest size when all its central hydrogen has become helium. At this time it expands to the point of devouring the planets that might be around it, if it had a planetary system.
This is what will happen to our Sun, when it becomes a red giant and swallows at least the first four planets, including Earth.
|◄ Previous||Next ►|
|Supernova Remains||Supernova M1|