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How Long Till Armageddon?
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<blockquote data-quote="jayem" data-source="post: 25292079" data-attributes="member: 8344"><p><span style="font-family: 'Verdana'">If you consider "Armageddon" to be an immense conflagration, then that will occur in about 5 x 10^9 years. The sun produces energy by fusing hydrogen into helium. The heavier helium sinks into the sun's core, with the hydrogen in the outer layers. The immense heat produced balances the internal gravity, which would cause the sun to collapse. But as the hydrogen becomes depleted, and less energy is generated, gravity will eventually take over. The core will become compressed, but this will temporarily generate such enormous heat that the star's outer layers will expand. The sun will become a red giant, and its diameter will extend beyond the earth's orbit. Our planet will be vaporized by this expansion of the sun's outer layer. Eventually, as this energy is dissipated, the sun will shrink down to a white dwarf. Our sun does not have enough mass to become a black hole. So the earth will ultimately be consumed by the sun. But we've got 5 billion years left. Or so the story goes.</span></p></blockquote><p></p>
[QUOTE="jayem, post: 25292079, member: 8344"] [FONT=Verdana]If you consider "Armageddon" to be an immense conflagration, then that will occur in about 5 x 10^9 years. The sun produces energy by fusing hydrogen into helium. The heavier helium sinks into the sun's core, with the hydrogen in the outer layers. The immense heat produced balances the internal gravity, which would cause the sun to collapse. But as the hydrogen becomes depleted, and less energy is generated, gravity will eventually take over. The core will become compressed, but this will temporarily generate such enormous heat that the star's outer layers will expand. The sun will become a red giant, and its diameter will extend beyond the earth's orbit. Our planet will be vaporized by this expansion of the sun's outer layer. Eventually, as this energy is dissipated, the sun will shrink down to a white dwarf. Our sun does not have enough mass to become a black hole. So the earth will ultimately be consumed by the sun. But we've got 5 billion years left. Or so the story goes.[/FONT] [/QUOTE]
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