Monday, November 15, 2010
Billions of years in the future, when our sun starts to run out of fuel it will become a red giant star its largest radius being about 256 times its current size and it will expand to consume the Earth's orbit.
Astronomers estimate that it will expand past the Earth's orbit in just a billion years. The heating Sun will evaporate the Earth's oceans away, and then solar radiation will blast away the hydrogen from the water. The Earth will never have oceans again. It will eventually become molten.
Still a while to go yet though and of course we may have gone extinct a long time before then anyway or on a more positive note if we survive found a way off the planet:)