Exoplanets like Earth have been discovered but not all Earth-like planets are equal when it comes to alien life.

A rare triple conjunction of Venus, Mars and Mercury is happening on the opposite side of the solar system to where Earth is, ...

Planet 9 sits at the edge of scientific imagination, promising either an epic expansion of the Solar System or a lesson in ...

Spectacular clouds swirl across the surface of Jupiter. These clouds contain water, just like Earth's, but are much denser on ...

Scientists have discovered more than 6,000 planets beyond our solar system. What if some of them aren't planets at all, but ...

In theory, a planet may be able to orbit a binary star system in a figure of eight, but it may not be particularly stable, ...