Some of the coldest objects currently listed as stars in the Milky Way may not be stars at all. A new study by astrophysicist ...

Authorities, though, have a much more mundane explanation: space junk. The Australian Space Agency said the spheres are ...

Scientists have identified new clues that could help astronomers spot one of the most famous hypothetical alien ...

The batch includes 40 new files, including 19 videos. The first batch of files included photos and reports dating back ...

Interstellar asteroid Oumuamua arriving from Pleiades star cluster. Oumuamua 3D model: Credit: ESO/M. Kornmesse According to NASA, ‘Oumuamua is the first known interstellar object to visit our solar ...

The Pentagon released its fourth batch of UFO files Friday following President Trump’s declassification order earlier this ...

Thousands of people have reported UFOs or alien encounters in Northern California. That number could soon go up.

A new study by Amirnezam Amiri of the University of Arkansas explores how these hypothetical "Dyson swarms" would appear ...

Jared Isaacman says NASA has captured imagery of unknown objects it cannot explain, as Trump pushes broader UAP ...

NASA's relationship with UFOs has evolved alongside broader changes in public and government interest in unexplained ...

Eventually, we'll launch a mission dedicated solely to studying an interstellar object. When that day comes, which one should ...

Australia's space agency said there's a completely rational, albeit cosmic, explanation behind the mysterious orbs that ...