Astronomers Identified a Lemon-Shaped Planet Displaying a Feature 'Unlike Anything Observed Before' ...

A strange 200 million-year-old object with the mass of a planet has been discovered 20 light-years from Earth, outside our solar system. The "rogue," as it's referred to by researchers, is producing ...

To reach Uranus is to journey into the absolute unknown. Situated in the deep freeze of the outer Solar System, nearly 3 billion kilometers from the Sun, this Ice Giant is a world of paradoxes. It is ...

A mysterious "rogue" planet has been observed gobbling six billion tonnes of gas and dust a second -- an unprecedented rate that blurs the line between planets and stars, astronomers said Thursday.

Why it's weird: Other than being a possible member of the diamond-planet family, this world exhibits a few other strange characteristics, most notably its amazingly short orbital period—just 2.2 hours ...