Goku's destructive capacity should be considered varies in range, I mean he's never blown a planet up but is capable of destroying a planet, I would perhaps put Goku in multi star busting+ since he's beaten opponents who eat stars (Broly galaxy buster & Kid Buu). Also its beyond my logic why people consider Goku Massively Hypersonic+++ So he moves a 100 times faster than a jet or bullets, that's kind of retarded, I would call his speed relativistic (Being close to light speed) or even light Speed. Also it took Goku mere seconds to reach Planet Name which is countless of light years away from Earth also out of our solar system, Should that be considered FTL? People beyond reason like putting Goku in massively Hypersonic (Which again is a ridicule thing to say especially when DBZ Fans have shown thousands of feats to pair Goku to FTL). However he is not FTL in combat speed, I can consider Goku's Combat speed to be massively hypersonic.
Kid Buu never destroyed any stars or ate them.