GRAVITATION AND RELATIVITY
EBSCO DATABASE - See Mrs. Phillips or Mrs. Pugh for login information.
http://en.wikipedia.org/wiki/Gravity#Gravity_and_astronomy
http://www-scf.usc.edu/~kallos/gravity.htm
http://www.adlerplanetarium.org/documents/curriculum-resources/gravity9-12.pdf
http://csep10.phys.utk.edu/astr161/lect/history/newtongrav.html
http://www.stanford.edu/~buzzt/gravity.html
http://www.newton.ac.uk/newtlife.html
http://csep10.phys.utk.edu/astr161/lect/history/kepler.html
http://scienceworld.wolfram.com/biography/Copernicus.html
http://plato.stanford.edu/entries/galileo/
http://csep10.phys.utk.edu/astr161/lect/retrograde/aristotle.html
CITATION MACHINE - use this to create your citations.
PHOTOS - CREATIVE COMMONS LICENSE
Use these for your image searches.
http://etc.usf.edu/clippix/pictures/
http://www.flickr.com/creativecommons
http://www.public-domain-image.com/
http://www.freephotobank.org/main.php
http://images.google.com/advanced_image_search?hl=en – Change usage rights= labeled for reuse w/modification
Eduscapes - a source of free photos for students to illustrate projects
Copyrightfriendly - this source from Joyce Valenza, 21st Century Librarian Guru, lists dozens of sites for multimedia photos, clip art, audio, etc.