The monstrous 85-mile-wide comet C/2014 UN271 is the second most distant body originating from the Oort Cloud found to be chemically active.

Close stellar encounters could change the structure of our planetary system, potentially dooming Earth or other worlds to ...

In 2003, NASA-funded researchers spotted what was then the most distant object discovered in our Solar System. The dwarf planet, named Sedna after the Inuit goddess of the sea, was found over 12.9 ...

Sedna will make its closest approach to the Sun in 2076, giving us a rare opportunity to visit the planetoid before it drifts ...

Scientists want to study a distant world in the solar system that is classified as a dwarf planet. But some experts think it ...

Sedna, a distant dwarf planet three-quarters the size of Pluto, is inching toward the brightest star in our sky — and in 2076 ...

The comet will zip past Mars’s orbit and reach its closest point to the Sun on 29 October 2025, at 1.35 astronomical units.

A cosmic body from another star system has entered Earth and is the largest one ever seen. In the previous decade, two other ...

Astronomers have discovered a new interstellar comet passing through our solar system, marking the third interstellar object ...

In the frozen outskirts of the solar system, a reddish dwarf planet orbits in silence. Known as Sedna, it is so distant that ...

The European Space Agency (ESA) will launch its bold "Comet Interceptor" Mission after 3I/ATLAS became the third interstellar ...

Imagine waking up one morning to the news: a black hole is drifting close to our solar system. It sounds like the plot of a .