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Explorations An Introduction to Astronomy, 3/e
Thomas T. Arny

Gravity and Motion

Web Links


Governmental Agencies

http://www.nasa.gov/
(http://www.nasa.gov/)

NASA homepage
http://www.ksc.nasa.gov/history/history.html
(http://www.ksc.nasa.gov/history/history.html)

NASA Archive of Space Exploration
Institutional / Education

http://web.mit.edu/afs/athena.mit.edu/user/r/e/redingtn/www/netadv/gr.html
(http://web.mit.edu/afs/athena.mit.edu/user/r/e/redingtn/www/netadv/gr.html)

Gravity Links
http://galileo.imss.firenze.it/museo/b/egalilg.html
(http://galileo.imss.firenze.it/museo/b/egalilg.html)

Galileo Galilei's life and work
Organizations

http://www.amsat.org/amsat/keps/kepmodel.html
(http://www.amsat.org/amsat/keps/kepmodel.html)

Keplerian Elements Tutorial