An oddly tilted object beyond Neptune moves in perfect sync, one orbit for every ten of Neptune’s, and scientists are intrigued.

'High-stakes': A new Trump move could 'redefine the boundary between church and state' Visiting Málaga this summer? New ...

A tiny object far beyond Pluto, newly discovered by the Subaru Telescope, could reshape our understanding of the early Solar ...

Astronomers have discovered a bizarre object in the outer solar system, 2020 VN40, that dances to Neptune’s gravitational beat in a never-before-seen rhythm. It’s the first of its kind, orbiting the ...

Planet Nine should appear stationary over the course of a single day but show detectable movement over months.

For millennia, astronomers thought Uranus was no more than a distant star. It wasn’t until the late 18th century that Uranus was universally accepted as a planet. To this day, the ringed, blue world ...

When checking out Uranus, scientists discovered something exciting: that the planet appears to have a long-term girlfriend.

Astronomical discovery: supersonic gales of 20,500 mph batter the exoplanet WASP-127b, breaking cosmic records for ...

"This is a big step in understanding the outer solar system," team leader Rosemary Pike from the Center for Astrophysics | ...

Astronomers have discovered a "fossil" world lying in the outskirts of the solar system, according to new research.

A baby planet is shrinking from the size of Jupiter with a thick atmosphere to a small, barren world, according to a new ...

Despite the powerful telescopes that modern astronomers have to work with, the distant reaches of the Solar System are still ...