A recently discovered celestial body is rewriting our knowledge of the Kuiper Belt and maybe challenging the existence of the ...

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

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

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 ...

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 ...

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.

NASA stands by their classification of Pluto, and some people agree Pluto is a dwarf planet. pluto is so extra all it wants is attention smh shut up ya lil dwarf The Tylt is focused on debates ...

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 ...

"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 ...

But because Pluto was the only such object yet discovered at that distance, it kept its classification as planet. New astronomy textbooks included distant Pluto and generations of students ...