Europa may be one of the most promising places to search for alien life, but it is also one of the hardest moons to explore.

Scientists suggest the Moon could act as a quarantine checkpoint before samples from Mars are brought back to Earth.

A new study suggests rocket exhaust from future lunar missions could contaminate pristine ice deposits near the Moon's poles, ...

Scientists say they've detected in the harshly acidic clouds of Venus a gas called phosphine that indicates microbes may ...

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

Director Steven Spielberg claimed aliens have already visited planet Earth – and now scientists said he may be on the money, ...

Credit: NASA Titan’s resources could one day make Saturn’s largest moon a major outpost for deep space exploration. Titan is ...

As an 8-year-old kid, the Apollo 11 moon landing inspired me to become an astronaut. I was fortunate to realize that dream ...

WASHINGTON, D.C. — NASA shares an update on its multibillion-dollar effort to build a permanent moon base on the lunar south pole. On Tuesday, the U.S. space agency announced nearly $600 million in ...

Astronomers have discovered GJ 3378b, a new Earth-like planet. NBC News' Gadi Schwartz talks to Harvard Astrophysicist Avi ...

Researchers employed agent-based modelling to examine how crew size, mission duration, and resupply schedules might influence ...