The planet where a piloting error by the young Starfleet officer Tom Paris killed three fellow officers, an accident he at first covered up.
Caldik Prime is a planet mentioned in the Voyager pilot Caretaker.
When Harry Kim befriends Tom Paris, others warn him off, and Paris explains why himself. At Caldik Prime he made a mistake at the helm that cost three officers their lives. He falsified reports to blame one of the dead, and might have got away with it, but later admitted the truth and was forced out of Starfleet.
The disgrace drove him to join the Maquis, who caught him on his first mission and landed him in the penal settlement in New Zealand. Janeway's offer to take him aboard Voyager as an observer is his way back.