Due to the nature of the Internet and its constant changes, this site cannot guarantee that the following links are functional after the date indicated. Date: 05.21.2002

1. "Asteroid". Microsoft Encarta Online Encyclopedia, 2001, http://encarta.msn.com

2. Paes, Nadia and Sloyan, Kate. "Asteroid 2002 NT7", 2002, http://www.eso.org/outreach/eduoff/catchastar/cas-projects/uk_nt7_1/

3. "Meteorite". Microsoft Encarta Online Encyclopedia, 2001, http://encarta.msn.com

4. "Gravitation". Microsoft Encarta Online Encyclopedia, 2001, http://encarta.msn.com

5. "Orbit (Astronomy and Physics)". Microsoft Encarta Online Encyclopedia, 2000, http://encarta.msn.com, contribution by James G. William, Ph.D.

6. "Craters-Introduction and Directions". University of Michigan 2002, http://www.astro.lsa.umich.edu/Course/Labs/craters/cr_intro.html

7. "The Orbital Mechanics-Features". 2002, http://homepages.primex.co.uk/~omen/omen13.htm

8. http://seds.lpl.arizona.edu/nineplanets/nineplanets/pxmisc.html#Comets

9. http://www.jpl.nasa.gov/

10. http://www.matter-antimatter.com/comets.htm

11. http://physics.about.com/library/dict/blsolarsystem.htm?terms=Asteroids%2C+comets

12. http://nssdc.gsfc.nasa.gov/planetary/text/asteroid_pr_980109.txt

13. Views of the Solar System, http://www.solarviews.com/eng/homepage.htm