PBS
Pbs Learning Media: Newton's Third Law: Action Reaction
An early astronaut's experiences teach students that Newton's third law of motion-for every action, there is an equal and opposite reaction-applies both on Earth and in outer space.
Curated OER
Space Shuttle Atlantis Sts 122 Launch Profile in Google Earth
The author has extensive experience using GPS and has worked with NASA. In his blog he posts information about the latest uses and applications of Google Earth.