Exoplanets like Earth have been discovered but not all Earth-like planets are equal when it comes to alien life.

Planets that once lived only in pulp novels and movie concept art are now turning up in real data. Astronomers are not just ...

We live in a very exciting time: answers to some of the oldest questions humanity has conceived are within our grasp. One of ...

New polarimetry data on interstellar comet 3I/ATLAS reveals bizarre refractory dust, proving this alien visitor formed in a ...

Astronomers have made an extraordinary discovery—for the first time, scientists have directly observed two alien planets ...

Far beyond the eight familiar planets in our solar system, countless bizarre and extreme worlds await discovery — and some have already been found. Thanks to rapidly advancing telescope technology, ...

Scientists have identified an unexpected way to study the hidden space weather of distant stars by observing strange, ...

Detective astronomers have discovered at least one unseen alien planet, and possibly another, around a distant star by observing the odd behavior of a planet already known to orbit the same star. The ...

An ocean world that’s teeming with microbes — and who knows what other kinds of life — is currently the best explanation for some chemical signatures that the James Webb Space Telescope has spotted in ...

Humans should look to planetary alignments outside of the solar system when searching for signatures of extraterrestrial communications, scientists say. The nascent search for radio transmissions from ...