For the first time, astronomers have managed to weigh a planet that is not bound to any star, a lonely world drifting through ...

Two separate research teams have observed a previously unseen microlensing event, confirming the existence of a particular ...

Far beyond Neptune, something heavy appears to be tugging on the outer solar system, bending the paths of distant icy worlds ...

Forbes contributors publish independent expert analyses and insights. An award-winning reporter writing about stargazing and the night sky. Is there an unseen planet — a "planet X" or "Planet Nine" — ...

When you buy through links on our articles, Future and its syndication partners may earn a commission. Image of the disk around the star TWA 7 recorded using ESO's Very Large Telescope's SPHERE ...

A Saturn-mass planet, which had been drifting alone through space after escaping the gravitational pull of its star, has been ...

More than a 150 years ago, before Neptune was ever sighted in the night sky, French mathematician Urbain Le Verrier predicted the planet’s existence based on small deviations in the motion of Uranus.

Planet Y is the latest in a series of hypothetical solar system planets that scientists have proposed in recent years, all with slightly different characteristics but collectively believed to be ...

The year was 2015. After traveling billions and billions of miles through the Erebus, New Horizons encounters the boatman, and the somber lord of the departed. The spacecraft could have been called ...

A team of astronomers is proposing that huge spiral patterns seen around some newborn stars, merely a few million years old (about one percent our sun’s age), may be evidence for the presence of giant ...

CAPE CANAVERAL, Fla., May 10 (Reuters) - Scientists poring over data collected by NASA's Kepler space telescope have discovered a world outside its field of view, demonstrating a new technique for ...