Planetary nebulae are among the most beautiful objects in the universe. But why are they called that? What do they represent, and how do they form? We will answer these questions in this article.
How do planetary nebulae form?
Towards the end of their life cycle, red giants and supergiants with masses between 0.8 to 8 times that of the Sun shed their outer layers of material, leaving behind only their hot core, which is known as a white dwarf.
