A distant 'exomoon' the size of Jupiter is changing how we think about the cosmos.

Thomas Mulligan visualizes the staggering scale of the solar system by calculating exactly how many Earth-sized planets could ...

Astronomers have discovered a rare planetary system 71 light-years away, where a Jupiter-sized world orbits a brown dwarf, ...

A Jupiter-size exoplanet orbiting a dead star baffled astronomers. But the planet named WD 1856 b could preview the fate of our own solar system when the sun dies.

On August 12, 2026, lucky viewers in and around Greenland, Iceland and Spain—weather allowing—will be able to see one of nature’s truly glorious sights: a total solar eclipse.

Two giant planets lighter than cotton candy are giving astronomers a rare new window into the origins of some of the galaxy's ...

"These two planets have densities comparable to a nice blob of shaving foam fresh from the can." ...

By Will Dunham WASHINGTON, July 22 (Reuters) - Scientists are documenting a planetary system in the Milky Way galaxy that is ...

Our definition of a planet has changed over the years — causing a bit of confusion. | Credit: wasan prunglampoo/Getty Images Over the past 250 years, the number of "planets" in our solar system has ...

Astronomers have identified a potentially habitable exoplanet just 25 light-years away, raising hopes that one of Earth's closest cosmic neighbours could eventually offer clues about life beyond our ...

Of all the strange worlds in our Milky Way galaxy, some of the most mysterious are those hanging around white dwarf stars. These are not regular stars busy smashing atoms in their cores, but the ultra ...