Vegeta is the home of the Saiyans, of which Goku is a member of.
Supanova thrown by Freeza ( 25 years before Season 1 and 2)
According to King Kai, the Saiyans 'shared' Planet Vegeta with the high-tech Tuffles. Once they went to war and (with the help of the Ozarru form) the Saiyans won and the Tuffles were (presumably) extinct. An unknown amount of time passed, and the Saiyans were taken over by Freeza and his men Afterwards, Freeza blew up Vegeta (Likley ordered by Beerus)