Surface features of Uranus' icy moon Miranda point to the existence of a once deep ocean, one that still may exist today.

The Moon has consistently accompanied Earth for over 4.5 billion years, serving as its sole natural satellite. This enduring relationship is pivotal to various environmental processes, notably the ...

On this course, too, Apollo could loop the moon and head back if its big engine failed to fire again. But, even so, it might miss the earth by 56,000 miles, marooning the astronauts in eternal ...

New data from India’s Chandrayaan-3 mission suggests that the Moon may have once had an ocean of lava on its surface sometime in the past. The data is covered extensively in a new paper ...

A mysterious magma ocean could fuel our solar system’s most volcanic world Friction from Jupiter provides the moon Io with enough warmth to sustain 100 active volcanoes. Briley Lewis ...

Its instruments, including ice-penetrating radar, will map nearly the entire moon. Europa Clipper is the largest spacecraft NASA has ever built to explore another planet, and spans over 100 feet ...

There was once a magma-filled ocean on the south pole of the moon, scientists recently discovered after analyzing lunar soil that revealed ancient information about the moon's origin. The study of ...

An ambitious mission to map out the entire global ocean floor is only 20 percent complete after a year of pandemic-related slowdowns.

Do that again and again over the course of 4.5 billion years and the interior heats up the way a wire hanger becomes almost hot enough to burn your fingers when you bend it back and forth rapidly.

There's a nifty acronym for interior water ocean worlds: IWOWs. Known IWOWs include Enceladus, Titan and Jupiter's fascinating moon Europa.