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  2. Solar System - Wikipedia

    • The Solar System is the gravitationally bound system of the Sun and the objects that orbit it. It formed about 4.6 billion years ago when a dense region of a molecular cloud collapsed, forming the Sun and a protoplanetary disc. The Sun is a typical star that maintains a balanced equilibrium by the fusion of hydrogen into helium at its core, releasing this energy from … See more

    Age4.568 billion years
    Nearest starProxima Centauri · (4.2465 ly) · Alpha Centauri · (4.36 ly)
    StarsSun
    Formation and evolution

    The Solar System formed at least 4.568 billion years ago from the gravitational collapse of a region within a large molecular cloud. This initial cloud was likely several light-years across and probably birthed several star… See more

    General characteristics

    Astronomers sometimes divide the Solar System structure into separate regions. The inner Solar System includes Mercury, Venus, Earth, Mars, and the bodies in the asteroid belt. The outer Solar System includes Ju… See more

     
  1. Solar System Exploration - NASA Science

     
  2. Solar system | Definition, Planets, Diagram, Videos, & Facts

  3. NASA/JPL Eyes - Solar System Interactive

  4. In Depth | Our Solar System – NASA Solar System Exploration

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