Stars passing close to the sun could cause planets to collide, including with Earth, or even be ejected as rogue planets, new ...

There are 8 planets in the solar system, each unique in size, distance, and composition. Learn about all the planets in order from the Sun, their characteristics, and key facts that make them ...

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

A recent study in Icarus suggests a wandering star could disrupt our solar system. Simulations reveal that a star passing ...

Wide-orbit planets are fairly common according to the study, and there's a good chance we have one of our own.

If our solar system seems stable, it's because our short lifespans make it seem that way. Earth revolves, night follows day, ...

Could a rogue star disrupt our peaceful solar system? Scientists are keeping a close eye on the galactic neighborhood, and ...

For years, scientists have puzzled over why Earth and Mars are missing certain key elements. Now, a fresh study suggests ...

Space artists can sometimes stretch scientific data for a bigger visual bang. At New York's natural history museum, they ...

Artist's impression of Planet Nine – a suspected “wide-orbit” planet – with the Sun in the distance; Neptune's orbit is shown ...