Bibliography

• Kepler's Discovery. Retrieved April 23, 2017, from http://www.keplersdiscovery.com

• Kepler’s Three Laws. Retrieved April 23, 2017, from http://www.physicsclassroom.com/class/circles/Lesson-4/Kepler-s-Three-Laws

• Johannes Kepler: His Life, His Laws and Times. Retrieved April 23, 2017, from https://kepler.nasa.gov/Mission/JohannesKepler/

• Russell, J. (1964). Kepler's Laws of Planetary Motion: 1609-1666. The British Journal for the History of Science, 2(1), 1-24. Retrieved April 23, 2017, from http://www.jstor.org/stable/4025081

• Knight, R. D. (2012). Student workbook for Physics for scientists and engineers, a strategic approach with modern physics, 3rd ed. Boston, Mass: Addison-Wesley.

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