For decades, Pluto was celebrated as the ninth planet of our solar system. However, in 2006, the International Astronomical ...

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

leading to Pluto’s reclassification as a dwarf planet. This decision sparked widespread debate among scientists and the public alike. So, what changed? Why did Pluto lose its planetary status?

Brown’s team discovered a dwarf planet, Eris, in January 2005 ... He titled his autobiography “How I Killed Pluto and Why It Had It Coming.” “I thought it was funny to talk about ...

A blue atmosphere, smooth areas, and youthful mountain ranges - this dwarf planet is full of surprises. When NASA's New Horizons probe flew past Pluto in July 2015, the images it returned astonished ...

As the gatekeepers to the Kuiper Belt, Charon and Pluto are a unique double dwarf planet system. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it ...

To understand what happened to Pluto ... "dwarf planets"—much as asteroids are sometimes called "minor planets." While some people mourned the passing of Pluto from mainstream planet to this ...

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

One idea is that Pluto got its moon system when a massive object smashed into the dwarf planet. The resulting debris then formed into the moons. This hypothesis was nicknamed the “Big Whack.” ...

Planitia structure on its surface. Ever since NASA's New Horizons sent back the first-ever photos of Pluto in 2015, the dwarf planet's mysterious heart-shaped region has puzzled scientists.

Pluto might have hogged much of the spotlight historically, but the dwarf planet is actually part of a double act, alongside its biggest satellite, Charon. A new analysis suggests that Pluto used ...