this project used a number of different sources for the purposes of Orbital Calculations.
"Rocket and Space Technology", Robert A. Braeunig Information used from this website includes equations and concepts for calculating elliptcal orbit speeds, directions, angles, and calculation of the Hohmann Transfer Orbit. http://www.braeunig.us/space/index.htm
NASA Glenn Research Center As a project relating to rocket science, the information we were able to find online through NASA's Glenn Research Center was vital to this project being completed. The specific information we used from here were the equations for the Tsiolkovsky Rocket Equation (Ideal Rocket Equation), and the equations for Specific Impulse and Equivalent Exit Velocity. https://www.grc.nasa.gov/
NASA Jet Propulsion Laboratory This source was our initial exposure to the Hohmann Transfer Orbit, and its specific application as a way for spacecraft to reach other planets without using a lot of fuel. https://www.jpl.nasa.gov/
Table of Integrals This was a helpful resource since the initial forms of many of the equations we used were in a form that required integration to be used. http://www.integral-table.com/