NASA’s most recent photos of Pluto, captured by the New Horizons spacecraft, have revealed some of the most intriguing and ...

despite the semantics around its classification. "I personally think Pluto is a planet and it has nothing to do with the fact ...

The small world was found during a search for the hypothetical Planet Nine, and astronomers say the next time it will reach ...

Pluto had been considered the ninth planet since its discovery in 1930 ... instead of a better classification that would have greatly increased the number of planets, he said.

When this happened, Alan Stern, the principal investigator behind the New Horizons Pluto fly-by mission, was not very amused. Our current classification system of what makes a planet a planet just ...

Alison Klesman, senior editor, Astronomy: To me, Pluto is not a planet — and that’s a sign of progress. Classification and nomenclature in science is admittedly often arbitrary, but the idea ...

Pluto should be reclassified as a planet ... Instead, Metzger recommends a planet classification based on whether it is sufficiently large so that its gravity allows it to become spherical ...

Ceres, and other large Kuiper Belt Objects such as Eris, Quaoar and Sedna. NASA stands by their classification of Pluto, and some people agree Pluto is a dwarf planet.

There’s a new frozen oddball orbiting the Sun, and it’s not your average space rock. It’s a planet—a minor one, to be ...

The newly discovered object, named 2017 OF201, has a 25,000-year orbit and is believed to be a large contender for dwarf ...

Why Pluto Doesn't Fit "Pluto is a dwarf planet. So be it — it's a classification," says Thierry Montmerle, the group's general secretary. "It's not a demotion or a promotion." He says Pluto ...