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: The Nature of Our World Award and a WEBBY Award in the Green category. As - TERRA: The Nature of Our World—lifeonterra.com was a finalist at the 2008 Wildscreen Film Festival in Bristol in the "New Media" Category. As - TERRA: The Nature of Our World—lifeonterra.com was a Finalist at the 2007 SxSW Interactive Festival in the Student Category. As - TERRA: The Nature of Our World-lifeonterra.com won the 2007 Webby for Student Online Film and Video ². As - TERRA: The Nature of Our World—lifeoneterra.com was a finalist at the 2007 Jackson Hole Wildlife Film Festival in the 'Best use of New Media Category'.