A Cosmic Comet is a type of Prankster Comet in Super Mario Galaxy. Mario or Luigi must race against their cosmic counterparts. At the end of the race, there is a Power Star. If the Cosmic version of Mario or Luigi gets to the Power Star first, the player loses a life, and has the option to start again, or return to the Comet Observatory. The Cosmic Comet doesn't reappear in the sequel but a similar one called the Clone Comet appears. This comet basically spawns multiple Cosmic Clones.
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