did the planet self explode but then it's pieces would have flown off in all directions and not stayed in a single belt if a collision shattered the missing planet where is the celestial body responsible for the collision did it also shatter but the debris circling the Sun when added up is insufficient to account for even one whole planet to say nothing of to also if the asteroids comprised the debris of two planets they should have retained the axial revolution of two planets but all the asteroids have a single axial rotation indicating they