Astronomers have yet to confirm the existence of exomoons, but molecular signal around a far away star offers some of the ...

But a new NASA study may have found a clue that one is orbiting a planet some 635 light-years from Earth. The inference comes ...

New research done at NASA's Jet Propulsion Laboratory reveals potential signs of a rocky, volcanic moon orbiting an exoplanet ...

"Detecting an exomoon would be quite extraordinary, and because of Io, we know that a volcanic exomoon is possible." ...

The existence of a moon located outside our solar system has never been confirmed but a new NASA-led study may provide ...

A frozen “ocean world” is the likeliest place in the solar system to foster alien life. Louise Prockter and her colleagues ...

For the first time, we are sending a spacecraft to explore an alien ocean world—a moon that might host life today ...

NASA's Europa Clipper probe will study Jupiter's moon Europa, which is thought to have an underground ocean and a potentially ...

Coverage of the launch is expected to begin at 11 a.m. ET and will be added to this story in the video player above. The ...

NASA has successfully launched the Europa Clipper spacecraft from Florida’s Kennedy Space Center to explore Jupiter’s moon ...

It won't land, but the robotic spacecraft will fly as close as 16 miles to the moon's frozen surface to probe oceans of ...

NASA’s Europa Clipper spacecraft successfully launched Monday afternoon from the agency’s Kennedy Space Center on Florida’s ...