A bizarre, ultra-light planet is cloaked in such a thick haze that even JWST can’t reveal its composition. Its unusual size and orbit are forcing scientists to rethink how planets form.

These worlds are among the least dense ever found, and all attempts to probe their atmospheres have been blocked by a mysterious smog.

NASA’s Hubble Space Telescope has captured some of the most detailed images ever recorded of comets breaking apart in space, ...

Life on Earth is a precious thing, especially given what astronomers know about the visible universe. Although researchers have so far identified over 6,000 exoplanets beyond our solar system, only a ...

Out of the 6,000 known exoplanets, it's these rocky worlds that are most worthy of attention in the search for life beyond our planet.

A hazy, ultra-light “super-puff” planet, Kepler-51d, is hiding its secrets and challenging how scientists understand planet formation.

Greek mythology has given a name to a great many objects in our solar system. But perhaps one of the least well understood ...

Discovered in 1930 at the Lowell Observatory, Pluto was demoted as a planet in 2006. Some want President Trump to take action via executive order.

Asteroid 16 Psyche has puzzled scientists for more than 200 years. Now, new research suggests that its large craters could ...

Andy Weir discusses his science-fueled novel “Project Hail Mary,” which has been adapted into a film that opens in theaters ...

Kepler-51d is a giant, ultra-light “super-puff” planet wrapped in an unusually thick haze that’s blocking scientists from ...

Astronomers have identified a strange new kind of exoplanet that challenges how scientists classify worlds beyond our Solar System. The planet, L 98-59 d, appears to contain a vast ocean of molten ...