Bibliography

1. http://www.physics.gmu.edu/classinfo/astr103/CourseNotes/mtn_kepl.htm

2.http://observe.ivv.nasa.gov/nasa/education/reference/orbits/orbit_sim.html

3.http://webug.physics.uiuc.edu/courses/phys150/fall97/slides/lect05/

4.http://www.kepler.arc.nasa.gov/kepler_sites.html

5. http://www-groups.dcs.st-and.ac.uk/~history/Mathematicians/Kepler.html

6. The Text Book