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  2. Solar System - Wikipedia

    en.wikipedia.org/wiki/Solar_System

    The inner Solar System is the region comprising the terrestrial planets and the asteroids. [ 89 ] Composed mainly of silicates and metals, [ 90 ] the objects of the inner Solar System are relatively close to the Sun; the radius of this entire region is less than the distance between the orbits of Jupiter and Saturn.

  3. NASA's Space Place - Wikipedia

    en.wikipedia.org/wiki/NASA's_Space_Place

    NASA Space Place. targeting upper-elementary aged children. Launched in 1998, [2][3] it was the first NASA website to create content about multiple missions directly for children. It has its own url, and it also serves as the kids' portion of the NASA Science Mission Directorate website. [4]

  4. Sun - Wikipedia

    en.wikipedia.org/wiki/Sun

    The Sun is the star at the center of the Solar System. It is a massive, nearly perfect sphere of hot plasma, heated to incandescence by nuclear fusion reactions in its core, radiating the energy from its surface mainly as visible light and infrared radiation with 10% at ultraviolet energies.

  5. NASA - Wikipedia

    en.wikipedia.org/wiki/NASA

    NASA was established on July 29, 1958, with the signing of the National Aeronautics and Space Act and it began operations on October 1, 1958. [ 4 ] As the United States' premier aeronautics agency, NACA formed the core of NASA's new structure by reassigning 8,000 employees and three major research laboratories.

  6. Timeline of Solar System exploration - Wikipedia

    en.wikipedia.org/wiki/Timeline_of_Solar_System...

    This is a timeline of Solar System exploration ordering events in the exploration of the Solar System by date of spacecraft launch. It includes: All spacecraft that have left Earth orbit for the purposes of Solar System exploration (or were launched with that intention but failed), including lunar probes. A small number of pioneering or notable ...

  7. Solar System belts - Wikipedia

    en.wikipedia.org/wiki/Solar_System_belts

    The Solar System belts were formed in the formation and evolution of the Solar System. [6] [7] The Grand tack hypothesis is a model of the unique placement of the giant planets and the Solar System belts. [3] [4] [8] Most giant planets found outside our Solar System, exoplanets, are inside the snow line, and are called Hot Jupiters.