Learn how a possible ninth planet, the theoretical Planet X, could have acquired its wide orbit in the outer Solar System — a ...

Scientists are intrigued after spotting a highly unusual celestial object lurking at the very edge of our solar system.

Astronomers have just discovered a new celestial body in our solar system that could challenge major space theory. 2017 OF201 ...

Our solar system’s origin story spans billions of years and involves clouds of gas, cosmic collisions, and planetary ...

The plains house the aptly named Very Large Array (VLA)—a radio telescope made of 27 different antennas, each of which looks ...

China officially launched its Tianwen-2 mission from the Xichang Satellite Launch Center, marking a major step in its growing ...

A new member of the solar system has been detected, the second-largest of its kind, suggesting there may be more like it ...

Astronomers have discovered a mysterious dwarf planet, 2017 OF201, far beyond Pluto. This discovery challenges existing ...

Astronomers find evidence of a possible ninth planet beyond Neptune, reigniting the debate about the formation of the Solar ...

According to astronomers, the last time this planet came close to the Sun was in 1930. In the same year, Pluto was discovered ...

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

A new dwarf planet, discovered beyond Neptune and described as Pluto's 'cousin,' could void the hypothesis of a Planet X in ...