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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.
English: Traditional astronomical planetary symbol for Pluto; see File:Pluto astrological - dwarf planet symbol.svg for Pluto's astrological and dwarf-planetary symbol. In Unicode this is reserved at U+2647 which renders as ♇ .
[28] [30] [32] Studies based on New Horizon's images of Pluto reveal no signs of contraction (as would be expected if Pluto's internal water had all frozen and turned into ice II) and imply that Pluto's interior is still expanding, probably due to this internal ocean; this is the first concrete evidence that Pluto's interior is still liquid.
Pluto first appeared as a nameless bloodhound tracking the escaped convict Mickey in the film The Chain Gang, which released on August 6, 1930. [11] On October 23 of that same year, The Picnic was released.
See File:Pluto symbol.svg for Pluto's traditional astronomical planetary symbol. Français : Symbole astrologique et de planète naine de Pluton ; voir File:Pluto monogram.svg pour le symbole traditionale astronomique.
[6] [a] Charon and Pluto are also tidally locked, so that they always present the same face toward each other. The IAU General Assembly in August 2006 considered a proposal that Pluto and Charon be reclassified as a double planet, but the proposal was abandoned. [7] Like Pluto, Charon is a perfect sphere to within measurement uncertainty. [8]
Tombaugh Regio (/ ˈ t ɒ m b aʊ ˈ r ɛ dʒ i oʊ /), sometimes nicknamed "Pluto's heart" after its shape, [2] is the largest bright surface feature of the dwarf planet Pluto. [ 3 ] [ 4 ] [ 5 ] It lies just north of Pluto's equator, to the northeast of Belton Regio and to the northwest of Safronov Regio , which are both dark features. [ 6 ]
The "Brass Knuckles" region of Pluto. Meng-p'o is at the zero meridian; to the east is the 'tail' of Belton Regio. Note that the Safronov Regio is labeled as "Krun" in this image. A series of semi-regularly spaced dark spots with irregular boundaries are nicknamed the Brass Knuckles. They average about 480 km (300 mi) in diameter and are ...