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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. List of gravitationally rounded objects of the Solar System

    en.wikipedia.org/wiki/List_of_gravitationally...

    Equatorial gravity: m/s 2 g: 274.0 27.94 Escape velocity: km/s: 617.7 Rotation period days: 25.38 Orbital period about Galactic Center [4] million years 225–250 Mean orbital speed [4] km/s: ≈ 220 Axial tilt to the ecliptic: deg. 7.25 Axial tilt to the galactic plane: deg. 67.23 Mean surface temperature: K: 5,778 Mean coronal temperature [5 ...

  4. List of Solar System extremes - Wikipedia

    en.wikipedia.org/wiki/List_of_Solar_System_extremes

    Subsolar temperature [61] Ganymede: 156 K Subsolar temperature [61] 80 K Nighttime temperature [62] Callisto: 168 K Subsolar temperature [61] 80 K Predawn nighttime temperature [63] Titan: 2 km (1.2 mi) Mithrim Montes, Xanadu [64] Mimas: Enceladus: 110 K Tiger Stripes [65] Tethys: Dione: Rhea: Iapetus: 20 kilometres (12 mi)Voyager Mountains ...

  5. List of Solar System objects by size - Wikipedia

    en.wikipedia.org/wiki/List_of_Solar_System...

    It was believed that the cutoff for round objects is somewhere between 100 km and 200 km in radius if they have a large amount of ice in their makeup; [1] however, later studies revealed that icy satellites as large as Iapetus (1,470 kilometers in diameter) are not in hydrostatic equilibrium at this time, [2] and a 2019 assessment suggests that ...

  6. Surface gravity - Wikipedia

    en.wikipedia.org/wiki/Surface_gravity

    For gas giant planets such as Jupiter, Saturn, Uranus, and Neptune, the surface gravity is given at the 1 bar pressure level in the atmosphere. [12] It has been found that for giant planets with masses in the range up to 100 times Earth's mass, their gravity surface is nevertheless very similar and close to 1 g, a region named the gravity ...

  7. Enough about the Great Red Spot, this giant storm on Neptune ...

    www.aol.com/article/news/2017/08/04/giant-storm...

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  8. Gravity map - Wikipedia

    en.wikipedia.org/wiki/Gravity_map

    A gravity map is a map that depicts gravity measurements across an area of space, which are typically obtained via gravimetry. Gravity maps are an extension of the field of geodynamics. Readings are typically taken at regular intervals for surface analysis on Earth. [1] Other methods include analysis of artificial satellite orbital mechanics ...

  9. Exploration of Neptune - Wikipedia

    en.wikipedia.org/wiki/Exploration_of_Neptune

    The second would fly by Neptune in 2038 at a distance of 1,000 km and drop an atmospheric probe en route to the tail of the heliosphere. planned [14] Freya: ESA/NASA: orbiter Main focus would be to map the gravitational fields in deep space, including the Outer Solar System (up to 50 AU) proposed [15] [16] OSS ESA/NASA: flyby proposed [17 ...