Our solar system hosts almost 900 known moons; more than 400 orbit the eight planets while the remaining orbit dwarf planets, ...

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 ...

Computer simulations suggest NASA’s Habitable Worlds Observatory could detect Earth-like exomoons around gas giant exoplanets through reflected starlight and lunar eclipses.

Jupiter’s Galilean moons, Europa, Ganymede, Callisto, and Io, have long been subjects of intense scientific scrutiny, ...

Southwest Research Institute was part of an international team that demonstrated how complex organic molecules (COMs), key ...

The popular online SF universe from top creators Jonathan Hickman, Nick Spencer, Mike Del Mundo and Mike Huddleston will debut in stores this July.

Avatar, Westworld, Interstellar, 2001: A Space Odyssey, and more make up our list of the most ambitious sci-fi masterpieces ...

Astrobiologists say we could find evidence of microbial life within the next 10–20 years. What does that mean? Where are we ...

Arnie said, "Get your a* to Mars", but is it really a good idea? We asked the experts about our Martian future.

Hours after saying that Barack Obama acted improperly by allegedly sharing classified information with Americans when he said ...

If life exists elsewhere in the universe, researchers at the University of Washington are finding the clues on Earth to help ...

On Thursday the U.S. president ordered the release of federal files related to UFOs and aliens, although no evidence of extraterrestrials visiting Earth is known to exist ...