Links
http://starchild.gsfc.nasa.gov/docs/StarChild/http://drmts.tripod.com/courses/edu355/schedule/moons/vocab.htm
http://www.slideshare.net/eagarciadeparedes/earth-moon-and-sun-presentation
http://www.childrensuniversity.manchester.ac.uk/interactives/science/earthandbeyond/sunmoonearth.asp
