'<<Has Thor ever blown a planet up?>.
recently bill has. if bill can, thor can. and I'm sure thor HAS, i just can't think of where at the moment. wouldn't matter - even a blast THAT powerful could theoretically be absorbed by Thor's hammer.'
Planetoid asteroid that was about to hit Asgard was destroyed by him
He dragged the Midgard serpent off earth which is the size of a planet
He apparently did serious damage to Ego with his God Force. (I'm not to sure about this) - And Ego was protecting itself with shielding. He also created weather effects on a planetary level which did damage to Ego.
He recently re made the moon after it had been destroyed.
I read recently that he lifted Twilight which is a sword made out of a neutron star. This apparently would weigh more than a planet.