2024年11月5日 · Pluto is a complex and mysterious world with mountains, valleys, plains, craters, and glaciers. It is located in the distant Kuiper Belt. Discovered in 1930, Pluto was long considered our solar system's ninth planet.

Pluto (minor-planet designation: 134340 Pluto) is a dwarf planet in the Kuiper belt, ... Its orbital characteristics are substantially different from those of the planets, which follow nearly circular orbits around the Sun close to a flat reference plane called the ecliptic.

2022年7月28日 · Pluto is the largest known dwarf planet in the solar system and used to be considered the ninth and most distant planet from the sun.

2025年2月19日 · Compared with the planets, Pluto is also anomalous in its physical characteristics. Pluto has a radius less than half that of Mercury; it is only about two-thirds the size of Earth’s Moon. Next to the outer planets—the giants …

2025年1月14日 · Pluto is a dwarf planet that lies in the Kuiper [KI-per] Belt. It's an area full of icy bodies and other dwarf planets at the edge of our solar system. Pluto is known as the "King of the Kuiper Belt" – and it's the largest object in the region, even though another object similar in size, called Eris, has a slightly higher mass.

Discovered in 1930, Pluto is the second closest dwarf planet to the Sun and was at one point classified as the ninth planet. Pluto is the largest dwarf planet but only the second most massive, with Eris being the most massive.

Pluto has a thin atmosphere of nitrogen, methane and carbon monoxide. The atmosphere has a blue tint and distinct layers of haze. Pluto has 5 moons. The largest, Charon, is so big that Pluto and Charon orbit each other like a double planet. Pluto has no ring system.

Ever since its controversial demotion from planetary status, Pluto characteristics and frozen environment have captivated astronomers seeking to unravel its mysteries. What exactly makes the former ninth planet so unique, from its orbital behavior to surface features?

2019年9月25日 · Pluto is the largest known dwarf planet in the Solar System, discovered in 1930. It was thought to be the 9 th planet of our system for 75 years until the discovery of Eris and other similar objects that led to its demotion from a planet to a dwarf planet in 2006.

Physical characteristics; Mean radius. ... Its formal name is 134340 Pluto, and its planetary symbol [8] or . [9] Pluto is the ninth largest body that moves around the Sun. Upon first being discovered, Pluto was considered a planet but was reclassified to a dwarf planet in 2006.