Can there be life on the Sun? Again, the speed at which chemical reactions take place is important to the existence of life. At the temperatures near the Sun, 5000 degrees and more, molecules vaporize and fly apart. That is one reason why the Sun is mostly made of atomic Hydrogen, the simplest gas, and there is no solid surface. Molecules, made of two or more atoms, have difficulty staying together long enough to form solid matter.
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