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Solar system

2015-03-22 22:46 | Author:gzzjd | Reading:amount |

With the sun as its center, solar system is an aggregate of all the celestial bodies constrained by the gravity of sun: 8 planets (Venus, Mercury, Earth, Mars, Jupiter, Saturn, Uranus, Neptune), at least 165 known satellites, 5 identified dwarf planets and tens of millions of small bodies in the solar system.

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