Not maybe easy but I'd start from here: https://en.wikipedia.org/wiki/Delta-v#/media/File:Delta-Vs_for_inner_Solar_System.svg https://en.wikipedia.org/wiki/Del

Not maybe easy but I'd start from here: https://en.wikipedia.org/wiki/Delta-v#/media/File:Delta-Vs_for_inner_Solar_System.svg https://en.wikipedia.org/wiki/Delta-v#/media/File:Delta-Vs_f... https://en.wikipedia.org/wiki/Hohmann_transfer_orbit https://en.wikipedia.org/wiki/Hohmann_transfer_orbit edit: More in-depth: http://ocw.mit.edu/courses/aeronautics-and-astronautics/16-346-astrodynamics-fall-2008/ http://ocw.mit.edu/courses/aeronautics-and-astronautics/16-3...