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  2. Neptune - Wikipedia

    en.wikipedia.org/wiki/Neptune

    A size comparison of Neptune and Earth. Neptune's mass of 1.0243 × 10 26 kg [8] is intermediate between Earth and the larger gas giants: it is 17 times that of Earth but just 1/19th that of Jupiter. [g] Its gravity at 1 bar is 11.15 m/s 2, 1.14 times the surface gravity of Earth, [71] and surpassed only by Jupiter. [72]

  3. Solar System model - Wikipedia

    en.wikipedia.org/wiki/Solar_System_model

    29 km (Neptune) In Ireland, this instantly recognisable roadside spherical sculpture is well known, and is used as the model for the Sun. The website [60] maps out the planetary orbits and shows everyday objects to scale the planets (e.g. a golf ball for Mars) Saskatoon Solar Walk Saskatoon, Saskatchewan: 1 : 1,275,600,000 109 cm 1 cm 110 m 4,500 m

  4. File:Neptune, Earth size comparison true color.jpg - Wikipedia

    en.wikipedia.org/wiki/File:Neptune,_Earth_size...

    The following other wikis use this file: Usage on af.wikipedia.org Neptunus; Aardmassa; Usage on bar.wikipedia.org Neptun (Planet) Usage on be.wikipedia.org

  5. Planetary equilibrium temperature - Wikipedia

    en.wikipedia.org/wiki/Planetary_equilibrium...

    There are large variations in surface temperature over space and time on airless or near-airless bodies like Mars, which has daily surface temperature variations of 50–60 K. [18] [19] Because of a relative lack of air to transport or retain heat, significant variations in temperature develop. Assuming the planet radiates as a blackbody (i.e ...

  6. File:Neptune, Earth size comparison.jpg - Wikipedia

    en.wikipedia.org/wiki/File:Neptune,_Earth_size...

    Main page; Contents; Current events; Random article; About Wikipedia; Contact us

  7. Planetary coordinate system - Wikipedia

    en.wikipedia.org/wiki/Planetary_coordinate_system

    Chart of lunar maria with lines of longitude and latitude. The prime meridian is the centre of the near side of the Moon.. A planetary coordinate system (also referred to as planetographic, planetodetic, or planetocentric) [1] [2] is a generalization of the geographic, geodetic, and the geocentric coordinate systems for planets other than Earth.

  8. Earth Similarity Index - Wikipedia

    en.wikipedia.org/wiki/Earth_Similarity_Index

    Though differing in size and temperature, terrestrial planets of the Solar System were reported to have high Earth Similarity Index values – Mercury, Venus, Earth and Mars. Sizes to scale. The Earth Similarity Index (ESI) is a proposed characterization of how similar a planetary-mass object or natural satellite is to Earth. It was designed to ...

  9. Outline of the Solar System - Wikipedia

    en.wikipedia.org/wiki/Outline_of_the_Solar_System

    The Sun, planets, moons and dwarf planets (true color, size to scale, distances not to scale) The following outline is provided as an overview of and topical guide to the Solar System: Solar System – gravitationally bound system comprising the Sun and the objects that orbit it, either directly or indirectly.