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

The researchers said 2017 OF201 was identified in observations by telescopes in Chile and Hawaii spanning seven years.

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

In the cold, dark outskirts of planetary systems far beyond the reach of the known planets, mysterious gas giants and ...

But this assumes that nothing affects the Solar System in the meantime, and that is not a certainty. As we travel around the ...

Today, it’s believed that Jupiter and Saturn, the largest planets, were the first to fully form, both within a few million ...

The unusual orbit of a possible dwarf planet, known as 2017 OF201, makes it less likely that our solar system contains a ...

A new study argues that Mars could act as a testing ground for habitat restoration, with lessons learned helping to fight ...

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

2025 — The James Webb Space Telescope has captured its first direct images of carbon dioxide in a planet outside the solar system in HR 8799, a multiplanet system 130 light-years away that has ...

The presence of this planet would explain a number of quirks in our Solar System, but there is significant ... "Surveys of planets around other stars in our galaxy have found the most common ...