Thread:Mangetsu20/@comment-5651818-20130111221056/@comment-4509522-20130112043809

Goku's power level at the time was around the same as when he used it against Frieza, ergo, his weakest variation of SSJ thus seen (besides the "false" super saiyan mode in that other movie). That kamehameha he used was easily capable of overpowering both Cooler and his Supernova attack. The resulting explosion clearly destroyed the sun, despite the fact that it somehow came back *anime logic* xD >.>