The fictional biologist in ‘Project Hail Mary’ claims that potential alien organisms might not be made of carbon or require water, unlike life on Earth.

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 ultra-low density planets are rare and they defy conventional understanding of how gas giants form, and if explaining how one formed wasn't difficult enough, this system has three!" ...

Experts from the Carl Sagan Institute at Cornell University have pinpointed 45 Earth-like planets that could have perfect ...

If we're to find extraterrestrial life in the universe, astronomers have pinpointed the best places to look for it. They have ...

By plying its ground-penetrating radar in the depths of Mars’s Jezero Crater, this rover has found even older deltas buried beneath those seen on the surface from space ...

A documentary filmmaker sparked a discussion of advanced Martian civilizations after sharing footage that appeared to depict ...

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.

A massive crater on asteroid Psyche may hold the key to whether it’s a lost planet’s core or something more complex. New simulations suggest NASA’s upcoming mission could finally solve the mystery.

Scientists have long thought there are a series of pyramid-like structures on Mars, with recent images showing one that 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 ...