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, ...

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

A scientist simulated the contents of the ice giant worlds, and found that a fluid layer may explain each planet’s strange ...

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 swoops on an elongated orbit that takes it from 30 to 50 times Earth’s distance from the sun. But the most curious thing about Pluto is its bond with Neptune. It’s called a resonance ...

Its orbit would be very distant, much beyond Neptune, and much more inclined if compared to the known planets — even more inclined than Pluto’s, whose inclination is about 17 degrees ...

(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 ...

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 ...

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 ...