Far from the bright glare of the Moon, a much smaller companion has been quietly keeping pace with Earth, looping around the ...

The asteroid is currently located in the constellation of Lynx, at a distance of more than 1.9 million miles (3.2 million ...

It's far out, man – literally. Researchers have uncovered the most-distant celestial object in the solar system, a pink dwarf planet nicknamed "Farout," detect at a distance of more than 100 times ...

Astronomers have finally weighed a wandering “rogue” planet, uncovering a Saturn-mass world flung into the galaxy after a ...

Planets usually stay close to their host stars, tracing steady paths shaped by gravity. Yet some planets break free and drift ...

While searching for the mysterious Planet X that some astronomers believe lurks on the edge of our solar system, researchers instead found an extremely distant object they dubbed “the Goblin.” And ...

In doing so, they found this orphan is within the same weight class as Saturn, strengthening the case that the galaxy teems ...

Astronomers hunting for Planet Nine have found some 50 new objects lying beyond the orbit of Neptune – including a few that may help them track down this elusive, distant world. The new discoveries, ...

It's estimated there may be trillions of rogue planets wandering through the Milky Way, unbound to any star. Since detecting our first ones, we have been presented with an odd mystery.

There are officially eight planets in our Solar System — yes, I know, Pluto was totally a planet, but not anymore — but that doesn't mean there isn't something lurking on the edge of our system that ...

A newfound object nicknamed "The Goblin" lurking in the far reaches of our solar system could be yet another clue that points us toward the discovery of the theoretical Planet X, or Planet 9 -- a ...

The solar system’s retinue of known, faraway worlds has gained another member: a small, icy body that takes 40,000 years to plod once around the sun, traveling farther away from our home star than all ...