Astronomy: Night Sky Planner (Jet Propulsion Library)

"The Night Sky Network is a nationwide coalition of amateur astronomy clubs bringing the science, technology, and inspiration of NASA's missions to the general public....Your one-stop planning resource for astronomy events....Find out why the full Moon is not the best time to see craters and how to make more exciting observations at other times of the month." -- from the website. <http://nightsky.jpl.nasa.gov/>