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  2. Formation and evolution of the Solar System - Wikipedia

    en.wikipedia.org/wiki/Formation_and_evolution_of...

    The outer planets' orbits are chaotic over longer timescales, with a Lyapunov time in the range of 2–230 million years. [105] In all cases, this means that the position of a planet along its orbit ultimately becomes impossible to predict with any certainty (so, for example, the timing of winter and summer becomes uncertain).

  3. Lunar and Planetary Institute - Wikipedia

    en.wikipedia.org/wiki/Lunar_and_Planetary_Institute

    The Lunar and Planetary Institute (LPI) is a scientific research institute dedicated to study of the solar system, its formation, evolution, and current state.The Institute is part of the Universities Space Research Association [1] (USRA) and is supported by the Science Mission Directorate of the National Aeronautics and Space Administration [2] (NASA).

  4. Cosmic microwave background - Wikipedia

    en.wikipedia.org/wiki/Cosmic_microwave_background

    Long before the formation of stars and planets, the early universe was more compact, much hotter and, starting 10 −6 seconds after the Big Bang, filled with a uniform glow from its white-hot fog of interacting plasma of photons, electrons, and baryons.

  5. Ashen light - Wikipedia

    en.wikipedia.org/wiki/Ashen_light

    Ashen light is a hypothesised subtle glow that has been claimed to be seen on the night side of the planet Venus.The phenomenon has not been scientifically confirmed, and theories as to the observed phenomenon's cause are numerous, such as emission of light by Venus, or optical phenomena within the observing telescope itself.

  6. Planetary science - Wikipedia

    en.wikipedia.org/wiki/Planetary_science

    In planetary science, the term geology is used in its broadest sense, to mean the study of the surface and interior parts of planets and moons, from their core to their magnetosphere. The best-known research topics of planetary geology deal with the planetary bodies in the near vicinity of the Earth: the Moon , and the two neighboring planets ...

  7. Solar System - Wikipedia

    en.wikipedia.org/wiki/Solar_System

    The outer planets Jupiter, Saturn, Uranus and Neptune, compared to the inner planets Earth, Venus, Mars, and Mercury at the bottom right The four outer planets, called giant planets or Jovian planets, collectively make up 99% of the mass orbiting the Sun. [ h ] All four giant planets have multiple moons and a ring system, although only Saturn's ...

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    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

  9. Planetary Data System - Wikipedia

    en.wikipedia.org/wiki/Planetary_Data_System

    The PDS Management Council serves as the technical policy board of the PDS, and provides findings for NASA with respect to planetary science data management, ensures coordination among the nodes, guarantees responsiveness to customer needs, and monitors the appropriate uses of evolving information technologies that may make PDS tasks both more ...