Hi,

I m trying to plot the gravitational potentialfield of two masses in maple. Im doing my work with inspirtion from this paper:

http://ocw.mit.edu/courses/aeronautics-and-astronautics/16-07-dynamics-fall-2009/lecture-notes/MIT16_07F09_Lec18.pdf

Page 4 and 5. Im able to plot the first graph on page 5, the contour plot of the gravitational potential in graph, by setting y=0. But when i try and plot the function of 2 variables in maple...