What do low-mass stars transform into at the end of their red giant phase?

A planetary nebula is an expanding blazing disk of hot gas that is ejected from a low-mass star towards the end of its existence. Despite its name, it has nothing to do with planets and was given that name because early astronomers believed it resembled planets when seen through a tiny telescope.

Asked by Vasilii Kulev · Last updated 4 years ago · 1.4K views · SOURCE