Red Sol
How hot planets when the Sun is a red giant?
How hot planets when the Sun is a red giant? All Everyone knows that the sun will swell and sink closer planets (Earth!), but what about the outer planets? Which will survive? Will to be warmer or colder when the sun is a red giant. If warmer, does anyone about the right temperature for people?
It is not known. Kiss goodbye Mercury, Venus, very probably. Earth is likely to be baked to ashes. Burned their environment, and oceans evaporated. Some astrophysicists think the earth can also be eaten. Mars at 1.5 AU, it will be very hot. The moons of Jupiter will warm up a bit. Saturn's moons is likely to remain fairly cold, like the moons of Uranus and Neptune. Tiny Pluto has three moons, and even a red giant star not defrost this far. And, of course, can not speak without Pluto discuss Xena, which is larger than Pluto. No one knows exactly how big the sun is achieved, although we know it will radiate more heat in swollen state. NOT expected to engulf Mars, and probably will not get big enough to absorb the earth. The inner planets are essentially uninhabitable, but the Jupiter's moons could be far enough to provide a safe haven. Our best option, 4 billion years, would be to move the earth to a small red dwarf youth. This star would be safe, stable, and give us much light for many billions of years.
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