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

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 ...

Almost 20 years after Pluto was infamously downgraded from its status as a planet, scientists now believe they have ...

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 ...

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 ...

"It just makes no sense from a classification standpoint to ... The only reason Pluto was ever deemed a planet, Brown added, is because it was first detected so long ago, before people realized ...

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 ...