Kiali

So I was thinking about cold temperatures lately, because of the early winter. I realized that for a temperature to be at absolute zero it can't gain any heat from its surroundings. But for that to be true, then we cannot create absolute zero here on earth because the earth itself will always provide some sort of heat from the surroundings (the core and such). So, then I thought that maybe a whole planet (somewhere out there) could be at absolute zero, but then wouldn't literally all of the planet have to be at that temperature? But couldn't the gases on the planet also contain heat? Including oxygen, so therefore, absolute zero can only be attained in a space with no oxygen (including other gases). But if that's the case then it could only be achieved in space? I think iv'e confused myself...thoughts?