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

A free-floating planet drifting through space is being closely followed by scientists who are managing to find out more about ...

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

Astronomers have finally weighed a wandering “rogue” planet, uncovering a Saturn-mass world flung into the galaxy after a ...

The Hubble Space Telescope has captured a spectacular new image of the largest and most unusual protoplanetary disk ever ...

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

Around the bright star Fomalhaut, astronomers spotted glowing clouds of debris left behind by colossal collisions between ...

Most planets are part of a star system of their own – but some go their own way, and they have remained largely mysterious ...

On January 5, 2005, astronomers at NASA discovered Eris, the second-largest dwarf planet in the solar system. Eris is just ...

"The combination of extreme disk size, strong asymmetries, winds, and potential planet formation makes it the perfect ...

Which way is ‘down’ has a different answer depending on where you are on Earth, in the solar system, in our galaxy and beyond ...