Given just how big space is, the solar system seems like it shouldn't be too mysterious. But there are actually plenty of ...

When most of us think about theweather on other planets, we imagine extreme conditions—boiling acid rain, methane snow, or ...

For years, astronomers have been searching for a mysterious ninth planet lurking in the dark outer reaches of our solar ...

Its size is estimated to be a bit smaller than Ceres, which is the smallest of the solar system’s five recognised dwarf planets and has a diameter of about 950km. Pluto, the largest of those ...

WASHINGTON (Reuters) -Scientists have identified an object about 435 miles (700 km) wide inhabiting the frigid outer reaches of our solar system that might qualify as a dwarf planet, spotting it ...

Cheng said the discovery of 2017 OF201 has implications for hypotheses involving the potential existence of a ninth planet in our solar system, dubbed Planet X or Planet Nine. This is because 2017 ...

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

Scientists have identified an object about 700km wide inhabiting the frigid outer reaches of our solar system that might qualify as a dwarf planet, spotting it as it travels on a highly elongated ...

Possible New Dwarf Planet Spotted Near the Edge of the Solar System By Will Dunham WASHINGTON (Reuters) -Scientists have identified an object about 435 miles (700 km) wide inhabiting the frigid ...