Nasa's Moon mission is getting closer to launch and it'll send people the furthest they've ever been. But when did humans last set foot on the Moon, how far away is it - and what's it actually made of ...

How far is the moon? I’ll bet that many of my readers know the answer; we all learned it in school. In fact, I still recall reciting it in fifth grade: “The moon is 240,000 miles from Earth.” What the ...

The familiar gray disk in our sky has long been framed as a fossil world, frozen in time since the early days of the solar ...