Comet is the name of two fictional comic book characters owned by DC Comics whose adventures have been published by that same company. The first character was a sapient horse with magical powers who was once a centaur in ancient Greece. The second character is a shapeshifter with three forms (male, female, and winged centaur). Both characters are connected to the Superman family of titles.
Due to the events depicted in the 1985 limited series Crisis on Infinite Earths, the first character's stories are no longer considered to be canon within DC's main shared universe, known as the DC Universe.