The space agency on Thursday announced a new study that will recruit leading scientists to examine unidentified aerial phenomena.

For several hundred million years after the Moon formed, frequent impacts coupled with abundant volcanism on the planet formed basaltic lava

Planetary systems around binary stars may be very different from those around single stars and might point to extraterrestrial life.

The larger the mirror, the more light is collected. This means that we can see farther back in time to observe star and galaxy formation.

For more than 60 years, scientists have been searching for possible signs that would indicate the existence of extraterrestrial intelligence

Black holes are more than just massive objects that swallow everything around them—they're also one of the universe's biggest energy sources

Researchers in Australia say their latest project scanned billions of stars and 144 known exoplanets for signs of alien broadcasts.

The new office will focus on incidents in, or near, "special use airspace" areas strictly controlled and blocked from general aviation use.

Thousands of alien worlds are known to orbit stars beyond our solar system. And many more worlds, possibly harboring life.

A new open data nonprofit scientific initiative by Avi Loeb will use a network of telescopes, cameras and computers to scan for alien life

NASA wants standards for evaluating claims of extraterrestrial life to help the public judge if discoveries are believable or not