There are eight official planets (sorry, Pluto) in our solar system: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and ...

NASA’s shocking claim hints at a hidden planet, possibly 10 times Earth's size, or a primordial black hole. Gravitational ...

Smaller gas giants are less likely to survive in such systems, surrounded by clashing planetary titans. With their lower ...

Astronomers are searching for a potential ninth planet, known as Planet Nine, which could reshape our understanding of ...

A planet parade like the one beginning tonight is quite uncommon, occurring once every 10-20 years. Here are the planets you ...

Learn about the size, temperature, and colour of each planet, and discover why Pluto is no longer considered a planet.

A planet parade is when several of our solar system's planets are visible in the night sky at the same time. There will be six planets visible this time around, including Venus, Mars ...

Trappist-1 b may experience intense volcanism An Earth-sized planet in a star system very similar to our solar system may have an atmosphere after all, suggests new research using the James Webb ...

But the formation process of multi-planet systems, like our own Solar System, is still poorly understood. The best example object to study multi-planet system formation is a young star known as ...

A researcher has used advanced models that indicate that the formation of Pluto and Charon may parallel that of the Earth-Moon system. Both systems include a moon that is a large fraction of the size ...

Astronomers believe that our solar system may still hold surprises ... Astronomers believe that Planet Nine could be 5-7 times the size of Earth and situated more than 200 times farther from ...