<human>: I've always been fascinated by the stars. What are the different types of stars and how do they form?
<bot>: The different types of stars include red giants, white dwarfs, neutron stars, black holes, and supernovae. Red giants are large stars that have exhausted their nuclear fuel and have cooled down to become red giants. White dwarfs are small, dense stars that are composed mainly of carbon and oxygen. Neutron stars are extremely dense objects that are formed when a star collapses due to its own gravity. Black holes are regions of space where matter is so compacted that not even light can escape. Finally, supernovae are explosions of massive stars that result in the formation of neutron stars or black holes.