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

Today, we know of more than 5,000 exoplanets: planets outside our solar system that orbit other stars. While the effort to ...

"The Voyager 2 flyby of Uranus in 1986 revealed an unusually oblique and off-centred magnetic field," the researchers wrote.

Why haven’t humans colonized other planets yet?  While we dream of expanding across the solar system, there are hidden and ...

America’s allies and foes alike have spent the past five days speculating about what Donald Trump’s re-election will mean for ...

A team combined compositional data of primitive bodies like Kuiper Belt objects, asteroids and comets with new solar data sets to develop a revised solar composition that potentially reconciles ...

Legendary Star Lacks Evidence for Large Planet Construction Ever since the dawn of human consciousness, skywatchers have been ...

If Voyager 2 had arrived a week earlier, it would have observed a completely different magnetospheric environment".

Astronomers found other KBOs with a similar mass to ... giving rise to its informal designation as the solar system’s ‘tenth planet.’ Although not a planet, Pluto does have enough ...

Aug. 31, 2023 — A Neptune-sized planet denser than steel has been discovered by an international team of astronomers, who believe its composition could be the result of a giant planetary ..