Charon (/ ˈkɛərɒn, - ən / KAIR-on, -⁠ən or / ˈʃærən / SHARR-ən), [note 1] or (134340) Pluto I, is the largest of the five known natural satellites of the dwarf planet Pluto. It has a mean radius of 606 km (377 mi). Charon is the sixth-largest known trans-Neptunian object after Pluto, Eris, Haumea, Makemake, and Gonggong. [19] .

2024年11月3日 · Charon is the largest of Pluto’s five moons. At half the size of Pluto, Charon is the largest known satellite relative to its parent body. The same surfaces of Charon and Pluto always face each other, a phenomenon called mutual tidal …

3 天之前 · Here's what to know about the brief tenure of our solar system's smallest planet. ... It did have five known moons: Charon, Nix, Hydra, Kerberos and Styx, all names for figures in Greek mythology ...

2025年1月20日 · Charon is the largest moon of the dwarf planet Pluto, but calling it a moon is really a misnomer; Pluto and Charon actually form a binary system. Whereas a moon usually orbits a...

The Pluto–Charon system is one of the few in the Solar System whose barycenter lies outside the primary body; the Patroclus–Menoetius system is a smaller example, and the Sun–Jupiter system is the only larger one. [151] The similarity in size of Charon and Pluto has prompted some astronomers to call it a double dwarf planet. [152]

2025年1月10日 · For decades, astronomers have tried to determine how Pluto acquired its unusually large moon Charon, which is about half the size of the dwarf planet. Now, new research suggests that Pluto...

2025年1月24日 · Charon is the largest of the five known moons, or natural satellites, of the dwarf planet Pluto. With a diameter of 1,212 kilometres (slightly more than half the diameter of Pluto), Charon is the 12th-largest natural satellite in the solar system.

2025年1月11日 · Charon, largest moon of the dwarf planet Pluto. It was discovered telescopically on June 22, 1978, by James W. Christy and Robert S. Harrington at the U.S. Naval Observatory station in Flagstaff, Arizona.

2023年6月23日 · Charon’s diameter of 753 miles makes it the largest moon relative to its home planet in the solar system, and astronomers consider the two as a double planet system orbiting around a common center of mass located between the two bodies.

2025年2月5日 · Charon comes in at a shallower angle this time, and when Pluto and Charon collide, they partially merge. So Charon penetrates somewhat into Pluto, digs into Pluto's icy mantle, and the two bodies merge for a little bit and co-rotate as a single massive contact binary, kind of like if Arrokoth was huge.