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For the giant planets, the "radius" is defined as the distance from the center at which the atmosphere reaches 1 bar of atmospheric pressure. [ 11 ] Because Sedna and 2002 MS 4 have no known moons, directly determining their mass is impossible without sending a probe (estimated to be from 1.7x10 21 to 6.1×10 21 kg for Sedna [ 12 ] ).
Neptune-crossing minor planets; Non-trojan minor planets. Centaurs; Damocloids; Trans-Neptunian objects (beyond the orbit of Neptune) Kuiper-belt objects (KBOs) Plutinos. Orcus, a dwarf planet. Vanth; Pluto, a dwarf planet. Complete list of Pluto's natural satellites. Charon; Twotinos; Cubewanos (classical objects) Haumea, a dwarf planet ...
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.
Pluto also had the IAU abbreviation P when it was considered the ninth planet. [41] The other large trans-Neptunian objects were only discovered around the dawn of the 21st century. They were not generally thought to be planets on their discovery, and planetary symbols had in any case mostly fallen out of use among astronomers by then.
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 ♇ .
If you were born before the '90s you probably know that Pluto, besides the much discussed dwarf planet that we are all so crazy about these days, is also a Disney animated dog.
Nix is a natural satellite of Pluto, with a diameter of 49.8 km (30.9 mi) across its longest dimension. [3] It was discovered along with Pluto's outermost moon Hydra on 15 May 2005 by astronomers using the Hubble Space Telescope, [1] and was named after Nyx, the Greek goddess of the night. [10]
Pluto is moving back into Aquarius. Why astrologers think it ...