SUMMARY: The Sun is heating up, and in 4 billion years from now it will swell up to become a red giant - Earth and the rest of the inner planets will be destroyed. But the deadly conditions that destroy the Earth will mean warmer temperatures in the outer Solar System, possibly supporting life. The region from Saturn to Pluto will warm up to the point that frozen water will melt on moons and planets. Scientists think the best chances for life will be found on Pluto and its moon Charon as well as Neptune's moon Triton because they're rich in organic chemicals.
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