For reference, Pluto’s average distance from the Sun is about 40 AU, so 2023 KQ14 is quite distant. At 23.4 billion miles (37 ...

Because Pluto is so dim, you need a telescope to see it. “A backyard telescope could do it under the right conditions,” says ...

A telescope has discovered a new world on the edge of the Milky Way – potentially confirming the ‘Planet X’ theory. Beyond ...

Ammonite was discovered using the Subaru Telescope in Hawaii, with follow-up confirmation from the Canada-France-Hawaii ...

How many dwarf planets are there in our solar system? The recent discovery of 2017 OF201 makes the tally anywhere between ...

Sedna will make its closest approach to the Sun in 2076, giving us a rare opportunity to visit the planetoid before it drifts ...

Because it is not gravitationally dominant, Pluto is considered a dwarf planet. However, only 5% of the world's astronomers voted on the redefinition, sparking controversy in the astronomy community.

As the New Horizons spacecraft gathers information about Pluto before and after its July 2015 close encounter, practically every day we're learning more about this dwarf planet.

Pluto's hazy skies are making the dwarf planet even colder, James Webb Space Telescope finds Why scientists are so excited about the newfound interstellar comet 3I/ATLAS (op-ed) ...

For the better part of a century, we believed there were nine planets in our solar system, with Pluto being the farthest from the sun. Since the discovery of more Pluto-sized dwarf planets, that ...

On Aug. 24, 2006, the International Astronomical Union voted to downgrade Pluto to a dwarf planet, causing controversy both scientifically and culturally.