Pluto - Wikipedia
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 - 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 2006.
Pluto Facts - Science@NASA
Dwarf planet Pluto is a member of a group of objects that orbit in a disc-like zone beyond the orbit of Neptune called the Kuiper Belt. This distant realm is populated with thousands of miniature icy worlds, which formed early in the history of our solar system about 4.5 billion years ago.
In Depth | Pluto – NASA Solar System Exploration
Dwarf planet Pluto is a member of a group of objects that orbit in a disc-like zone beyond the orbit of Neptune called the Kuiper Belt. This distant realm is populated with thousands of miniature icy worlds, which formed early in the history of our solar system about 4.5 billion years ago.
Why is Pluto no longer a planet? - BBC News
2015年7月13日 · For more than 70 years, Pluto was one of nine planets recognised in our Solar System. But in 2006, it was relegated to the status of dwarf planet by the International Astronomical Union (IAU). So...
Pluto | Size, Moons, Temperature, & Facts | Britannica
2024年11月10日 · Pluto, large, distant member of the solar system that formerly was regarded as the outermost and smallest planet. In 2006 a group of experts in the scientific community voted to give Pluto the new classification of dwarf planet.
Pluto: Everything you need to know about the dwarf planet - Space.com
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.
Is Pluto a planet? It depends. - Astronomy Magazine
2024年5月28日 · In 2006, astronomers ‘demoted’ Pluto from a major planet in the solar system to a dwarf planet. But was Pluto snubbed? Our experts answer.
Pluto Information and Facts | National Geographic
Pluto 101 Pluto is one of the most mysterious and controversial celestial objects in the solar system. Find out what most mystifies scientists and stargazers about this dwarf planet.
Did Pluto ever actually stop being a planet? Experts debate.
2024年2月16日 · In 2006, the International Astronomical Union demoted Pluto to one of dozens of dwarf planets. In 2006, the world lost a lot of stars—actress Shelley Winters, soul icon James Brown, naturalist...