If you've been following exoplanet research over the last couple of years, you've definitely heard of K2-18b. Located 124 ...

Over half a century after Apollo 17, humans are heading back into deep space — this time with the intention of staying.

When a mysterious crescent appeared over Moscow in 1967, alien enthusiasts were unaware they were actually tracking a 3-megaton weapon designed to bypass American radar.

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

More than a week has gone by since SpaceX helped restore a full crew of astronauts at the International Space Station.

There’s a thin layer of human-made stuff enrobing the planet. A data dive into the anthroposphere. Earth’s a medium-size rock ...

NASA took another crack at fueling its giant moon rocket Thursday after leaks halted the initial dress rehearsal ...