The Moon’s most famous “sound” was never heard by human ears. It was traced instead in jagged lines on Apollo-era seismographs, a slow fade of vibrations that seemed to go on far longer than anything recorded on Earth.

Lunar outposts powered by nuclear energy sounds like a sci-fi novel. But NASA is pushing to make it reality — and quickly.

Stargazers will in one week have a chance to spot Saturn and the moon sharing a section of the night sky in what's known as a conjunction.

After a fairly eventful mission to the Moon's surface, Charles Duke left several items on the Moon, and a message to whoever might find them in the future.