[RaceBannon]

If the Sun were made of bananas, it would be just as hot The Sun is hot, as the more astute of you will have noticed. It is hot because its enormous weight – about a billion billion billion tons – creates vast gravity, putting its core under colossal pressure. Just as a bicycle pump gets warm when you pump it, the pressure increases the temperature. Enormous pressure leads to enormous temperature. If, instead of hydrogen, you got a billion billion billion tons of bananas and hung it in space, it would create just as much pressure, and therefore just as high a temperature. So it would make very little difference to the heat whether you made the Sun out of hydrogen, or bananas, or patio furniture

Okay, so how hot is Saturn?? Isn't Saturn huge? Shouldn't Saturn be hotter than the Earth just based on it's mass lke this example declares??

[sig226]

Saturn is nowhere near as large, or massive, as the sun. Saturn is 95 times the mass of the Earth. The sun is 333,000 times the mass of the Earth.

Enormous pressure leads to enormous temperature. If, instead of hydrogen, you got a billion billion billion tons of bananas and hung it in space, it would create just as much pressure, and therefore just as high a temperature.

This statement is deceptive. If you packed all those bananas together in space, their mass would create a gravitational field that would compress them. This causes heat. You'd get the same heat that exists at the center of the Sun. The difference is that there is enough heat to cause the hydrogen in the sun to fuse into helium. The lack of free hydrogen in the bananas means that they would make a very large mess, but very little nuclear fusion. The banana fire would quickly burn itself out.

[greatplains]

Nah. No humans to initiate global warming.

[LibWhacker]

Correct. Core temperature of Saturn is around 12,000°C, while the Earth’s is around 6,000°C.