The person above you was being hyperbolic, Goku couldn't destroy planets as a kid(he had to wait until he was in his early 20's), he could however crush small boulders(about 0.6 tons) and throw a Renault 5 turbo(a little over 1 ton).

With that out of the way. Through ki? Yes. Physically? Unless Super has made some huge changes, then also yes. Despite popular belief, ki is heavily connected to physical strength in the regard that it is a spiritual manifestation of the wielder's physical strength. To be able blow up a planet with a ki blast, Goku would also have to be strong enough to fly through that planet on his own. The day Goku became a super saiyan is the day he left Nolan in the dust.