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  2. Ice planet - Wikipedia

    en.wikipedia.org/wiki/Ice_Planet

    Although there are many icy objects in the Solar System, none of them qualify as planets under the IAU definition of planet.However, most planetary-mass moons are ice-rock (e.g. Ganymede, Callisto, Enceladus, Titan, and Triton) or even primarily ice (e.g. Mimas, Tethys, Dione, Rhea, and Iapetus) and so qualify as ice planets under geophysical definitions of the term.

  3. OGLE-2005-BLG-390Lb - Wikipedia

    en.wikipedia.org/wiki/OGLE-2005-BLG-390Lb

    OGLE-2005-BLG-390Lb (known sometimes as Hoth by NASA [1]) is a super-Earth ice exoplanet orbiting OGLE-2005-BLG-390L, a star 21,500 ± 3,300 light-years (6,600 ± 1,000 parsecs) from Earth near the center of the Milky Way, making it one of the most distant planets known.

  4. Ice giant - Wikipedia

    en.wikipedia.org/wiki/Ice_giant

    In the 1990s, it was determined that Uranus and Neptune were a distinct class of giant planet, separate from the other giant planets, Jupiter and Saturn, which are gas giants predominantly composed of hydrogen and helium. [1] Neptune and Uranus are now referred to as ice giants. Lacking well-defined solid surfaces, they are primarily composed ...

  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. Icy moon - Wikipedia

    en.wikipedia.org/wiki/Icy_moon

    Most known large icy moons belong to giant planets, whose orbits lie beyond the Solar System's frost line; the remainder (such as Charon and Dysnomia) formed around dwarf planets such as Pluto and Eris, typically in large impacts not unlike the impact thought to have formed Earth's moon. In the case of icy gas giant satellites, an additional ...

  7. Five Planets Will Be Visible in the Sky at the Same ... - AOL

    www.aol.com/lifestyle/five-planets-visible-sky...

    In late March 2023, five planets will all be visible in the night sky. This rare alignment is guaranteed to be beautiful—here's how to watch it. In late March 2023, five planets will all be ...

  8. Gliese 581c - Wikipedia

    en.wikipedia.org/wiki/Gliese_581c

    The team released a paper of their findings dated 27 April 2007, published in the July 2007 journal Astronomy & Astrophysics. [1] At the time of discovery, it was reported to be the first potentially Earth-like planet in the habitable zone of its star [5] [6] and the smallest-known exoplanet around a main-sequence star, but on 21 April 2009, another planet orbiting Gliese 581, Gliese 581e ...

  9. List of natural satellites - Wikipedia

    en.wikipedia.org/wiki/List_of_natural_satellites

    Of the Solar System's eight planets and its nine most likely dwarf planets, six planets and seven dwarf planets are known to be orbited by at least 300 natural satellites, or moons. At least 19 of them are large enough to be gravitationally rounded; of these, all are covered by a crust of ice except for Earth's Moon and Jupiter's Io. [1]

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