Discovery of 2017OF201, a large trans-Neptune Object, challenges previous beliefs about the Kuiper Belt and hints at the existence of a theoretical Planet Nine.

Scientists have identified an object about 435 miles (700 kilometres) wide inhabiting the frigid outer reaches of our solar ...

Scientists have discovered a colossal object approximately 435 miles wide in the frigid outer reaches of our solar system, ...

Astronomers announced the discovery of a new dwarf planet, provisionally named 2017 OF201, located in the remote outskirts of ...

In January, the Trump administration halted disbursement of funds from the President’s Emergency Plan for AIDS Relief, known ...

The hunt for habitable worlds has become a hot topic in astronomy. For decades, the search has been focused on planets in the ...

A series of studies have cast doubt on the sensational claim that "the strongest evidence yet" was found that life exists anywhere else besides Earth.

A potential new dwarf planet has been discovered in the outer reaches of the solar system, and its existence poses the ...

An international team reported that a new celestial object — perhaps a star, pair of stars or something else entirely — is ...

The small world was found during a search for the hypothetical Planet Nine, and astronomers say the next time it will reach ...

Earth has a new neighbor that lives far, far away. Scientists from the Institute for Advanced Study's School of Natural ...