The solar system lost its ninth planet back when Pluto was demoted to a dwarf planet, but research might indicate that there ...

Astronomers have uncovered a massive new trans-Neptunian object, 2017 OF201, lurking at the edge of our solar system. With an ...

Astronomers have photographed WISPIT 2b, a rare young planet forming in a dusty disk gap around a sun-like star. This ...

Astronomers have directly spotted a rare young planet, WISPIT 2b, still forming within the gap of a dusty ringed disk around ...

On Dec. 17, 2018, the International Astronomical Union’s Minor Planet Center announced that 2018 VG18, nicknamed ‘Farout’, ...

New discoveries of objects in the Kuiper Belt have also presented challenges for the Planet Nine theory. The latest is known ...

Astronomers have picked up evidence of an Earth-sized world, distinct from the previously hypothesised Planet Nine and Planet ...

Unusual gravitational activity has been found in the outer solar system. It could be a ninth planet but scientists now propose it's a black hole.

A Jupiter-like planet has been found orbiting a young sun-like star in a solar system far away in what is a potentially ...

Since the first discovery of planets beyond the solar system in 1995, more than 6,000 exoplanets have been identified. Many ...

An astronomer at the University of Arizona is excited about the potential for life on a possible planet in the nearest solar ...

Some scientists claim that these objects point to "Planet Nine," a hypothetical large planet far beyond what we can see. But, despite what you've likely read, most scientists aren't convinced.