The destruction of Planet Vegeta is slightly different between the manga and the anime. In the anime, Frieza destroys the planet with a Supernova. In the manga, Frieza simply states that he attacked the planet (though he does state that he destroyed it when mentioning how Goku resembled the Saiyan that caused him trouble). Also, Raditz (in the first volume of Dragon Ball Z) states that Planet Vegeta was destroyed by an asteroid three years before his arrival, in his big speech explaining Goku's backstory before Goku came to Earth (Vegeta is told the same account shortly after the planet is destroyed); it is quite possible that Raditz was not aware that Frieza was behind their planet's devastating destruction. In the anime, King Kai also tells Goku a different story, of planet Vegeta's Guardian drawing in many large asteroids to destroy the planet. This may have been fabricated to keep Goku from learning of Frieza and seeking him out.