Stability of the Solar System essentially the distance from sun to earth). These are now known as the Kirkwood gaps. Some asteroids were later discovered to orbit in these gaps, but their orbits are unstable and they will eventually break out of the resonance due to close encounters with a major planet. Another common form of resonance in the Solar System is spin–orbit resonance, where the period of spin (the time it takes the planet or moon to rotate once about its axis) has a simple numerical relationship with its orbital period. An example is our own Moon, which is in a 1:1 spin–orbit resonance
Terra Alta, West Virginia Terra Alta, West Virginia Terra Alta is a town and former coal town in Preston County, West Virginia, United States. The population was 1,477 at the 2010 census. Terra Alta was originally called Portland, and under the latter name had its start in the 1850s. The present name Terra Alta is derived from Latin meaning "high land". The town is home to the James S. Lakin House and Terra Alta Bank, each listed on the National Register of Historic Places. Terra Alta is located at (39.444343, -79.544002). According to the United States Census Bureau, the town has a total area