Pluto isn't alone—it's part of the Kuiper Belt with possibly hundreds of other planet-sized objects. Because Pluto hasn't ...

NASA’s Webb Space Telescope reveals ancient surface of Pluto and other celestial bodies for the first time - Scientists say ...

Trans-Neptunian objects (TNOs) are icy bodies that vary widely in size, from large dwarf planets like Pluto and Eris—each ...

The number of planets that orbit the sun depends on what you mean by “planet,” and that’s not so easy to define ...

Pluto-Charon Formation Scenario Mimics Earth ... Dec. 19, 2024 — New studies offer a clearer picture of how the outer solar system formed and evolved based on analyses of trans-Neptunian objects ...

For the first time, astronomers have imaged dozens of belts around nearby stars where comets and tiny pebbles within them are ...

On Feb. 18, 1930, Clyde Tombaugh discovered Pluto, at that time classified as the ninth planet.

In August 2006, the International Astronomical Union made the controversial, but correct, decision to demote Pluto from its ...

Charon is unusual because it is the largest moon in the solar system compared with its parent body. In fact, Charon and Pluto are so similar in size that they are considered a double dwarf planet ...