Of the five dwarf planets in the Solar System – including Eris, Ceres, Makemake, and Haumea – Pluto is easily the best-known ...

By Grace Jacobs Corban The Discovery A Neptune-sized planet, TOI-3261 b, makes a scorchingly close orbit around its host star ...

Using NASA ‘s TESS (the Transiting Exoplanet Survey Satellite) and observations from ground-based telescopes in Australia, ...

So things stood for 65 years. Although Pluto's orbit was more elongated than the other planets' (and even crossed the orbit of Neptune—not the kind of thing you would expect a decent planet to ...

It must have cleared all other celestial bodies, except its own moons, from its orbit.

(See what scientists say about Pluto’s status as a planet.) As early as the 1840s, a tricky calculus foretold the existence of a planet beyond the orbit of Neptune. Calculations based on Neptune ...

is a disc-shaped region beyond the orbit of Neptune’s in the outer solar system—50 Earth-sun distances—that’s home to dwarf planets like Pluto, Makemake and Eris. It’s also thought to be ...

The Kuiper Belt is a disc-shaped region around the distant outer solar system beyond the orbit of Neptune that’s thought to be populated by icy objects and comets. Pluto is 40 times further from ...

Carrying enough fuel to slow it into a Pluto-centric orbit would have added lots of ... an asteroid belt beyond Neptune. New Horizons won’t make it to any of the other Kuiper dwarves, but ...

the committee declared that Pluto no longer qualified as a planet because of its position in the cluttered Kuiper Belt, where thousands of objects sit beyond the orbit of Neptune. Pluto ...