PPT Slide
- Giancoli, Douglas C., Physics: Principles with Applications. Fourth edition. Prentice Hall, Englewood Cliffs. 1995.
- Http://map.gsfc.nasa.gov/html/cbr.html
- Compton’s Reference Collection
- Dauber, Philip and Muller, Richard. The Three Big Bangs: Comet Crashes, Exploding Stars, and the Creation of the Universe. Addison-Wesley, New York. 1996.