Main Page | See live article | Alphabetical index Synchronous rotation is a planetological term describing a body orbiting another, where the orbiting body takes as long to rotate on its axis as it does to make one orbit; and as such, always keeps the same hemisphere pointed at the body it is orbiting. The Moon and the Earth have a synchronic relationship. In fact, most moons in the solar system have synchronous rotation due to tidal locking. This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.