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The fact that the Sun will not last forever is now clear to the entire scientific community, and indeed most of the world. We know that it appeared about 4.57 billion years ago, and that, in about five billion years or so it will begin to swell into a red giant. This will happen because it doesn't have enough mass to explode into a supernova. The bad news is that, when it starts swelling, it will eventually expand to a region that now hosts our planet's orbit. That means that the Earth will literally be engulfed by flames. Experts say that there is a small possibility the Earth will remain untouched by the solar surface, although, even in this scenario, temperatures on the surface become too great for liquid water to exist, exterminating all life and making the world a vast desert. However, the growing consent in the astronomical community is that we will be swallowed. We should still take comfort in knowing that the situation can be addressed, some expert say. It is pos!
sible that looser gravitational bounds would allow for our planet to escape to a safer orbit naturally, before the swelling Sun gets to it. But this scenario carries its catches too, experts say. “If that were the only effect, the Earth would indeed escape final destruction. However, the tenuous outer atmosphere of the sun extends a long ...
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http://news.softpedia.com/news/How-To-Escape-a-Giant-Swelling-Red-Sun-118239.shtml
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