OK, I'll be the wiseass:
The article says the thing is supposed to have four times the mass of Jupiter, not four times the size. And due to how planets work, that could actually make that guy smaller than Jupiter, what with the gas collapsing under its own gravitation. Now, this alleged planet is apparently hotter than Jupiter, which might make it bigger than if it had the same temperature as big J (hot gas takes more space than cold gas, as any microwave dinner with the lid still on will happily (and messily) prove to you). So in short: Get your facts straight, The Escapist.
Also, just to clarify: Absolute zero is at about -273 °C, or, more conveniently, at exactly 0 K (Kelvin). Everything else is at about 3 K, or -270 °C. The big exception being stars and their children, because big things collapse into themselves, which creates friction, which creates heat.
Incidentally, Jupiter is really just barely a planet. Make it more massive, and it'll shrink (as already indicated). Make it even more massive, and it will rub itself so hot that it'll ignite and become a star. In case you're running short on things to bore girls girls at a party with.
