Apr 22, 2025 · Why is Pluto no longer a planet? Pluto was reclassified as a dwarf planet in 2006 by the IAU because other objects might cross its orbit.

Pluto's eccentric orbit periodically brings it closer to the Sun than Neptune, but a stable orbital resonance prevents them from colliding. Pluto has five known moons: Charon, the largest, …

Sep 28, 2025 · Pluto, large, distant member of the solar system that formerly was regarded as the outermost and smallest planet. It also was considered the most recently discovered planet, …

Originally the ninth planet from the Sun, Pluto was recategorized as a dwarf planet as it was discovered that it is one of numerous large bodies within the Kuiper Belt. Pluto is not visible …

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. Learn …

Dec 3, 2024 · 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.

Mar 27, 2025 · Pluto is a dwarf planet situated in the Kuiper Belt, a distant region of icy bodies beyond Neptune’s orbit. Pluto is distinguished by its small size, irregular orbit, and …

Pluto is a Kuiper Belt object, meaning it lies within a thick disc of worlds beyond Neptune. NASA’s New Horizons is the only spacecraft to have visited Pluto. It’s hard not to have a soft spot for …

Jul 28, 2022 · Pluto was once considered the ninth planet in the solar system, it was demoted in 2006 to dwarf planet status. We explore this icy body in more detail here.

Pluto was discovered on February 18th, 1930 by the Lowell Observatory. For the 76 years between Pluto being discovered and the time it was reclassified as a dwarf planet it completed …