Subway map of the solar system
by John from John D. Cook on (#A7DZ)
This is a thumbnail version of a large, high-resolution image by Ulysse Carion. Thanks to Aleksey Shipiliv (@shipilev) for pointing it out.
It's hard to see in the thumbnail, but the map gives the change in velocity needed at each branch point. You can find the full 2239 x 2725 pixel image here or click on the thumbnail above.