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The western part of Pluto's northern hemisphere consists of an extensive, highly distinctive set of 500-meter-high mountains informally named Tartarus Dorsa; the spacing and shape of the mountains looks similar to scales or to tree bark. A January 2017 Nature paper by Dr. John Moores and his colleagues identified these icy ridges as penitentes ...
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.
They determined Pluto's mass to be 1.31×10 22 kg; roughly one five-hundredth that of Earth or one-sixth that of the Moon, and far too small to account for the observed discrepancies in the orbits of the outer planets. Lowell's prediction had been a coincidence: If there was a Planet X, it was not Pluto. [44]
The dwarf planet Pluto has five natural satellites. [1] In order of distance from Pluto, they are Charon , Styx , Nix , Kerberos , and Hydra . [ 2 ] Charon, the largest, is mutually tidally locked with Pluto, and is massive enough that Pluto and Charon are sometimes considered a binary dwarf planet .
However, acceptance of Eris as the tenth planet implicitly demanded a definition of planet that set Pluto as an arbitrary minimum size. Many astronomers, claiming that the definition of planet was of little scientific importance, preferred to recognise Pluto's historical identity as a planet by "grandfathering" it into the planet list. [47]
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As Pluto, the planet of growth, and evolution, ... Pluto will be in Aquarius again from Jan. 20 to Sept. 1, 2025. Pluto will then moving back to Capricorn from Sept. 1 to Nov. 19, 2024.
A map of Pluto showing the names officially approved by the IAU as of 12 February 2025, along with many informal names in bold and italics.. This is a list of named geological features on Pluto, identified by scientists working with data from the New Horizons spacecraft.
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