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  1. www.britannica.com › science › dwarf-planetDwarf planet | Definition, Characteristics, & Facts | Britannica

    22. Mai 2024 · dwarf planet, body, other than a natural satellite (moon), that orbits the Sun and that is, for practical purposes, smaller than the planet Mercury yet large enough for its own gravity to have rounded its shape substantially.

    • Clark R. Chapman

  2. en.wikipedia.org › wiki › List_of_gravitationally_roundedList of gravitationally rounded objects of the Solar System

    Vor 3 Tagen · This is a list of most likely gravitationally rounded objects (GRO) of the Solar System, which are objects that have a rounded, ellipsoidal shape due to their own gravity (but are not necessarily in hydrostatic equilibrium ). Apart from the Sun itself, these objects qualify as planets according to common geophysical definitions of ...

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  4. en.wikipedia.org › wiki › PlutoPluto - Wikipedia

    Vor 2 Tagen · Pluto ( minor-planet designation: 134340 Pluto) is a dwarf planet in the Kuiper belt, a ring of bodies beyond the orbit of Neptune. It is the ninth-largest and tenth-most- massive known object to directly orbit the Sun. It is the largest known trans-Neptunian object by volume, by a small margin, but is less massive than Eris.

  5. www.britannica.com › science › planetPlanet | Definition, Characteristics, & Facts | Britannica

    16. Mai 2024 · Planet, broadly, any relatively large natural body that revolves in an orbit around the Sun or around some other star and that is not radiating energy from internal nuclear fusion reactions. There are eight planets orbiting the Sun in the solar system.

    • The Editors of Encyclopaedia Britannica

  6. en.wikipedia.org › wiki › Rings_of_SaturnRings of Saturn - Wikipedia

    Vor 5 Tagen · The rings of Saturn are the most extensive and complex ring system of any planet in the Solar System. They consist of countless small particles, ranging in size from micrometers to meters, [1] that orbit around Saturn. The ring particles are made almost entirely of water ice, with a trace component of rocky material.

  7. spaceplace.nasa.gov › menu › solarsystemPlanets | NASA Space Place – NASA Science for Kids

    6. Mai 2024 · Why Are Planets Round? And how round are they? explore; All About Neptune. The coldest planet in our solar system . explore; All About Uranus. The planet that spins on its side . explore; All About Saturn. The planet with beautiful rings

  8. www.britannica.com › science › solar-systemSolar system | Definition, Planets, Diagram, Videos, & Facts

    Vor 3 Tagen · solar system, assemblage consisting of the Sun —an average star in the Milky Way Galaxy —and those bodies orbiting around it: 8 (formerly 9) planets with more than 210 known planetary satellites (moons); many asteroids, some with their own satellites; comets and other icy bodies; and vast reaches of highly tenuous gas and dust known as the inter...