Charon, the largest of Pluto's moons, was discovered in 1978. Lesson is a walk through of how to solve for the phases of Charon. It uses two different points on Pluto and takes into account the tilt of the pole, the rotational axis, and...

Use spectral knowledge to make discoveries on a distant moon. Small groups gather information from images of one of Saturn's moons. The moon orbits within the E-ring made up of mainly water ice. Using information about the composition of...