The Sun makes up about 99.8% of the Solar System’s mass.

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All the planets, moons, asteroids and comets together are a tiny fraction; Jupiter holds most of what is left. The Sun is so massive that it could hold about 1.3 million Earths by volume.

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An atom is mostly empty space.Water expands by about 9% when it freezes.<span class="aj-year">1868</span>Helium was discovered on the Sun before on Earth.