Pluto

You can browse channels like Pluto Comedy, Pluto Action, Pluto Spotlight, Pluto Drama, and more.

Based on geometry of minimum and maximum distance from Earth and Pluto radius in the factsheet The dwarf planet Eris is roughly the same size as Pluto, about 2330 km; Eris is, however, 28% more massive than Pluto.

Closest to Pluto is Charon, which is large enough to be in hydrostatic equilibrium and to cause the barycenter of the Pluto–Charon system to be outside Pluto.

Exploration main The portions of Pluto's surface mapped by New Horizons (annotated) The New Horizons spacecraft, which flew by Pluto in July 2015, is the first and so far only attempt to explore Pluto directly.

Pluto main Informally named geographic features on Pluto As for August 2016, all place names on Pluto and its satellites are informal (not approved by the International Astronomical Union).

Pluto main The discovery of these large KBOs in similar orbits to Pluto led many to conclude that, aside from its relative size, Pluto was not particularly different from other members of the Kuiper belt.

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This map, compiled from images and data gathered by NASA’s New Horizons spacecraft during its flight through the Pluto system in 2015, contains Pluto feature names approved by the International Astronomical Union.

After many such repetitions, Pluto is sufficiently slowed, and Neptune sufficiently speeded up, that Neptune begins to catch up with Pluto at the opposite side of its orbit (near the opposing node to where we began).

Alan Stern has contended that even a small increase in Pluto's surface temperature can lead to exponential increases in Pluto's atmospheric density; from 18 to as much as 280 millibars (three times that of Mars to a quarter that of the Earth).

A similar system is used on the New Horizons Pluto probe to keep costs down during its ten-year cruise from Jupiter to Pluto.

By Pluto's second perihelion, Neptune will have completed a further one and a half of its own orbits, and so will be a similar distance ahead of Pluto.

If there are forty objects the size of Pluto, then there are probably ten that are twice the size of Pluto.

In the case of Pluto 's satellites, it has been proposed that the present near resonances are relics of a previous precise resonance that was disrupted by tidal damping of the eccentricity of Charon's orbit (see Pluto's natural satellites for details).

Its closest approach to Pluto was on 14 July 2015; scientific observations of Pluto began five months prior to closest approach and will continue for at least a month after the encounter.

Its gravitational influence is such that the barycenter of the Pluto–Charon system lies outside Pluto.

Like other Kuiper-belt objects (KBOs), Pluto shares features with comets ; for example, the solar wind is gradually blowing Pluto's surface into space.

Like Pluto, its orbit is highly eccentric, with a perihelion of 38.2 AU (roughly Pluto's distance from the Sun) and an aphelion of 97.6 AU, and steeply inclined to the ecliptic plane.

Lowell had made a prediction of Planet X's orbit and position in 1915 that was fairly close to Pluto's actual orbit and its position at that time; Ernest W. Brown concluded soon after Pluto's discovery that this was a coincidence, a view still held today.

Not only are these objects similar to Pluto in size, but many also have satellites, and are of similar composition (methane and carbon monoxide have been found both on Pluto and on the largest KBOs).