For over four years now, NASA's Lunar Reconnaissance Orbiter (LRO) has been circling the Moon, giving us an unprecedented look at one of the most familiar objects in the sky.
Along with the incredible amount of measurements and scientific data the satellite has been sending back to scientists here on Earth, LRO has also been taking pictures of the entire lunar surface. NASA recently stitched all those images together, and created a video that gives us a look at something we've never seen before — the rotating moon:
The moon really does rotate, even though it doesn't look like it from here. Because the moon is 'tidally locked' to the Earth, that means that it always has one face pointed towards us. However, it also means that the time it takes to rotate once is the same as the time it takes to go around the Earth — 27 days.