Researchers believe that 2017 OF201’s highly eccentric orbit points to a chaotic origin, possibly caused by a gravitational ...

It had not been thought possible that such tiny, weak stars could provide the conditions needed to form and host huge planets ...

A team of astronomers believe they may have discovered a new dwarf planet—just like Pluto—on the edge of our solar system.

As it orbits the sun once every 25,000 years, the celestial body 2017 OF201 travels beyond the Kuiper Belt into a region ...

Astronomers have discovered a new small planet far from Pluto, expanding our understanding ... size of known dwarf planets and big asteroids like Ceres.Its orbit is extremely elongated, swinging ...

Scientists may have discovered a dwarf planet far beyond Neptune — an unearthing that may disprove a longstanding theory ...

announced the discovery on May 21. At roughly 435 miles wide, 2017 OF201 could qualify as a dwarf planet, the same designation Pluto has had since its demotion from ninth planet in 2006.

Dwarf planets like Pluto follow the first two rules, but they cannot “clear the neighborhood” near their orbits. Scientists have been eager to uncover more TNOs in the Kuiper Belt, which is what led ...

Astronomers announced Wednesday they have discovered ... planet orbiting a tiny star, a bizarre pairing that has stumped scientists. Most of the stars across the Milky Way are small red dwarfs ...

Plus, an in-depth look at how the West Texas city of Seminole reacted when a measles outbreak tore through the region.