Image: Orbital motion
Description: Diagram of orbital motion of a satellite around the earth, showing perpendicular velocity and acceleration (force) vectors.
Title: Orbital motion
Credit: Earth derived from this image (public domain) The rest is my own work done in Processing. Source code available upon request.
Author: Own work
Usage Terms: GNU Free Documentation License
License Link: http://www.gnu.org/copyleft/fdl.html
Attribution Required?: Yes