1
The stage in which a star spends most of its life, fusing hydrogen into helium.
2
A large, bright, cool star in a late stage of its evolution.
3
A collapsed core of a massive star left after a supernova explosion.
4
A stellar explosion that briefly outshines an entire galaxy.
5
A cloud of gas and dust in space.
6
A small, dense star that is the leftover core of a red giant after it has shed its outer layers.
7
A contracting mass of gas that represents an early stage of a star's formation.
8
An object with such strong gravity that nothing, not even light, can escape from it.
