Such stars eventually blow off the material of their outer layers, which creates an expanding shell of gas called a planetary nebula ... a white dwarf cools until it becomes a black dwarf ...

mottled texture. The nebula is also known as Messier 76 or M76 and is located 3,400 light-years away in the northern circumpolar constellation Perseus. The name 'Little Dumbbell' comes from its ...

A nebula is a giant ... vary in colour and texture – including cottony white, fiery orange, and smoky blue. In the background, blue, yellow, and red stars dot over black space.⁣” ...