MOON

Phases of the moon

http://www.youtube.com/watch?v=9z10XjPio0M&feature=related
my favorite:  http://www.youtube.com/watch?v=sXK63GpwUqs

http://www.youtube.com/watch?v=gHlMReTpJXw

Eclipes

http://www.gamequarium.org/dir/SqoolTube_Videos/Science/Space/Solar_System/magic_school_bus_gets_lost_in_space_9690.html