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-They were all formed by the Big Bang (a star exploded, sending shockwaves through a cloud of dust which condensed and formed the solar system. the remaining particles started to collide with each other, getting bigger and bigger as their gravity increased.)

-They all orbit around the sun.

-All of the planets except for Mercury and Venus have at least one moon that orbits the planet.

-All of the planets can clear "junk" out of its atmosphere (if their gravity is strong enough the "junk" will be pulled in and no longer remain in its atmosphere). This is also the difference between dwarf planets (3 of them are Pluto, Eris, and Ceres) and planets.

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13y ago

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