Freedman, R. & Kaufmann, W.
Universe 6th Edition
, W.H. Freeman, New York. 2002
Bennett, J., Donahue, M., Schneider, N., Voit, M,
The Cosmic Perspective 2nd Edition
Pearson Education, San Francisco, 2002
O'Shaughnessy, Tam & Ride, Sally
Exploring Our Solar System
, Random House Children's Book, New York. 2003
Kerrod, Robin,
The Universe and How it Works
, Barnes and Noble Books, New York. 1993
See Diane Huot, YNHTI 2005
StudyWorks! Science Deluxe CD Rom
www.nineplanets.org
www.jpl.nasa.gov
http://starchild.gsfc.nasa.gov
http://tycho.usno.navy.mil/vphase.html
www.astro.uiuc.edu/projects/data/MoonPhases/index.html
aa.usno.navy.mil/faq/docs/moon_phases.html
www.space.com
www.antiquetelescopes.org
www.cartage.org.lb
