survive

Hey guys. I just wondering how can not Saiyan survive in Space?! In the Dragon Ball Z Movie "Bardock the Father of Goku", Bardock goes in Space when he fight with Frieza. So why Goku "Super Saiyan" in the Namek Saga can not survive in Space? :cool:

Piccolo and Cell should survive the disc.because the can regenerate their cells.but they should lose all ki(not powerlevel)and lose control for few seconds after they been hitted bi disc.disc shouldn't do any damage. what do ya think?