We’ve discovered thousands of exoplanets — but not a single confirmed exomoon. That doesn’t mean they aren’t out there. In fact, moons may be even more common than planets — and in some cases, even ...

Using NASA's Transiting Exoplanet Survey Satellite (TESS), an international team of astronomers has discovered a new ...

Are aliens real? The question has animated conspiracy theories for decades and enthralled at least one former president of ...

Planet K2-18b, an apparent water world 124 light years away, has been seen as a promising location in the search for aliens, ...

What if we were the aliens? In a great 1991 episode of 'Star Trek: The Next Generation,' the notion of aliens among us was ...

Documents might help scientists shed light on unexplained phenomena and government secrets, experts said.

Some people thought he was confirming aliens exist. But he later clarified on Instagram that during his time in office, he ...

American air force accused of sharing fake news around extraterrestrial activity to divert attention from its ‘nefarious ...

How big would a telescope need to be to see Earth’s dinosaurs from 66 million light-years away? Think big—and then think ...

A viral Obama podcast answer about aliens prompted Trump to accuse him of revealing secrets and promise to release UFO files ...

Following Obama’s remarks, Trump’s announcement that he would order the release of files related to aliens and UFOs, the ...