Complex sentence: They are a race of aliens whose home planet, Vegeta, was wiped out by meteors many years ago; only four remained, Goku (originally named Kakarot) and Raditz among them.
Split into simpler sentences: They are a race of aliens whose home planet, Vegeta, was wiped out by meteors many years ago. Only four remained, Goku (originally named Kakarot) and Raditz among them.