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  2. Pluto - Wikipedia

    en.wikipedia.org/wiki/Pluto

    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 .

  3. Geology of Pluto - Wikipedia

    en.wikipedia.org/wiki/Geology_of_Pluto

    The geology of Pluto consists of the characteristics of the surface, crust, and interior of Pluto. Because of Pluto's distance from Earth, in-depth study from Earth is difficult. Many details about Pluto remained unknown until 14 July 2015, when New Horizons flew through the Pluto system and began transmitting data back to Earth. [1]

  4. Exploration of Pluto - Wikipedia

    en.wikipedia.org/wiki/Exploration_of_Pluto

    A Pluto orbiter/lander/sample return mission was proposed in 2003. The plan included a twelve-year trip from Earth to Pluto, mapping from orbit, multiple landings, a warm water probe, and possible in situ propellant production for another twelve-year trip back to Earth with samples. Power and propulsion would come from the bimodal MITEE nuclear ...

  5. Orbital period - Wikipedia

    en.wikipedia.org/wiki/Orbital_period

    The orbital period (also revolution period) is the amount of time a given astronomical object takes to complete one orbit around another object. In astronomy , it usually applies to planets or asteroids orbiting the Sun , moons orbiting planets, exoplanets orbiting other stars , or binary stars .

  6. Charon (moon) - Wikipedia

    en.wikipedia.org/wiki/Charon_(moon)

    A simulated view of the Pluto–Charon system showing that Pluto orbits a point outside itself. Also visible is the mutual tidal locking between the two bodies. Charon and Pluto orbit each other every 6.387 days. The two objects are gravitationally locked to one another, so each keeps the same face towards the other. This is a case of mutual ...

  7. Pluto: planet or not? - AOL

    www.aol.com/pluto-planet-not-180022512.html

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  8. List of former planets - Wikipedia

    en.wikipedia.org/wiki/List_of_former_planets

    Pluto: 1930 2006 Dwarf planet: Following its discovery in 1930, Pluto was considered the ninth planet. Numerous scientific discoveries in the 1990s and early 2000s placed doubt on this classification, and after the discovery of Eris, which was thought to be larger than Pluto, the International Astronomical Union met to determine a definition of ...

  9. Moons of Pluto - Wikipedia

    en.wikipedia.org/wiki/Moons_of_Pluto

    Pluto's four small circumbinary moons orbit Pluto at two to four times the distance of Charon, ranging from Styx at 42,700 kilometres to Hydra at 64,800 kilometres from the barycenter of the system. They have nearly circular prograde orbits in the same orbital plane as Charon. All are much smaller than Charon.