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The dwarf planet Pluto has five natural satellites. In order of distance from Pluto, they are Charon, Styx, Nix, Kerberos, and Hydra. Charon, the largest, is mutually tidally locked with Pluto, and is massive enough that Pluto and Charon are sometimes considered a binary dwarf planet. 展开
The innermost and largest moon, Charon, was discovered by James Christy on 22 June 1978, nearly half a century after Pluto was discovered. This led to a substantial revision in … 展开
Charon is about half the diameter of Pluto and is massive enough (nearly one eighth of the mass of Pluto) that the system's barycenter lies … 展开
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 … 展开
It is suspected that Pluto's satellite system was created by a massive collision, similar to the Theia impact thought to have created the 展开
Transits occur when one of Pluto's moons passes between Pluto and the Sun. This occurs when one of the satellites' orbital nodes (the points where their orbits cross Pluto's ecliptic) … 展开
CC-BY-SA 许可证中的维基百科文本 NASA’s Three-Billion-Mile Journey to Pluto Reaches Historic …
2015年7月14日 · New Horizons made its closest approach to Pluto in 2015, after a decade-long journey through the solar system. The spacecraft revealed Pluto's complex and fascinating …
Pluto - Wikipedia
Pluto's diameter is 2376.6±3.2 km and its mass is (1.303±0.003)×10 kg, 17.7% that of the Moon (0.22% that of Earth). Its surface area is 1.774443×10 km , or just slightly bigger than Russia or Antarctica (particularly including the Antarctic sea ice during winter). Its surface gravity is 0.063 g (compared to 1 g for Earth and 0.17 g for the Moon). This gives Pluto an escape velocity of 4,363.2 km per h…
Wikipedia · CC-BY-SA 许可下的文字New Horizons - NASA Science
2006年1月19日 · New Horizons was the first spacecraft to encounter Pluto, a relic from the formation of the solar system. By the time it reached the Pluto system, the spacecraft had traveled farther away and for a longer time period (more …
In Depth | Pluto – NASA Solar System Exploration
Pluto is orbited by five known moons, the largest of which is Charon. Charon is about half the size of Pluto itself, making it the largest satellite relative to the planet it orbits in our solar system. …
Pluto Facts - Science@NASA
Pluto's orbit around the Sun is unusual compared to the planets: it's both elliptical and tilted. Pluto's 248-year-long, oval-shaped orbit can take it as far as 49.3 astronomical units (AU) from the Sun, and as close as 30 AU. (One AU is the …
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Pluto - NASA Science
Pluto is a dwarf planet located in a distant region of our solar system beyond Neptune known as the Kuiper Belt. Pluto was long considered our ninth planet, but the International Astronomical Union reclassified Pluto as a dwarf planet in …
Exploration of Pluto - Wikipedia
Pluto, discovered by Clyde Tombaugh in 1930, is an interesting target for planetary exploration, but Pluto presents significant challenges for exploration because of its small mass and great distance from Earth.
Images of Pluto and All Available Satellites - NASA
201 行 · Pluto's 'Hulk-like' Moon Charon: A Possible Ancient Ocean? Full Resolution: TIFF (10.81 MB) JPEG (540.1 kB) 2016-02-11
Latest Images of Pluto from New Horizons - NASA
2015年7月6日 · These are the most recent high-resolution views of Pluto sent by NASA’s New Horizons spacecraft, including one showing the four mysterious dark spots on Pluto that have …
