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the world wont end for billions of years actually,the plants animals and humans might all die but the earth will still be here until the sun dies.even if astroids and comets hit earth it will still be here until the sun dies out and explodes,unless the solar system enters a area of space it hasnt been before or a planet hits earth that has never been seen by us.just because the plants,animals,humans are dead wont mean it's the end of the world the world dont end until the sun does.many scientists estimate a few billion years but no one knows for sure.
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By that time, the sun will have expanded and heated to a point where the Earth's surface will be uninhabitable. It will be nowhere near the red giant stage yet, but it will still have had that effect.
Sky & Telescope of October 2002 and sometime in 2009 had interesting articles about the long-term future of this planet. A local library might have them.
EDIT: Not S & T in 2009, it was Cosmos in August 2008.
Sky & Telescope of October 2002 and sometime in 2009 had interesting articles about the long-term future of this planet. A local library might have them.
EDIT: Not S & T in 2009, it was Cosmos in August 2008.
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Well, it could be from an asteroid collision or it could be from the sun going into the red giant phase.