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

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 ...

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

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 ...

A new dwarf planet, discovered beyond Neptune and described as Pluto's 'cousin,' could void the hypothesis of a Planet X in ...

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 ...

Both Morison and Byrne agree the IAU classification has had a scientific impact, and think Pluto and similar bodies should be classified as planets. But “it’s not particularly crucial ...

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 ...

There were a number of campaigns launched that were aimed at ensuring that Pluto was reinstated as a planet ... and head of the IAU's Planetary Classification and Experimental Nomenclature ...

Many planet classification schemes have been proposed ... These bodies were approximately the size of Pluto, which was then considered a planet. With a new definition, the small worlds and Pluto ...