I made an app quite a while ago that lets you explore apparent motions, distances and more in 3D: http://gunn.co.nz/astrotour/?data=tours/retrograde.xml http:/

I made an app quite a while ago that lets you explore apparent motions, distances and more in 3D: http://gunn.co.nz/astrotour/?data=tours/retrograde.xml http://gunn.co.nz/astrotour/?data=tours/retrograde.xml (Keep clicking the next arrow at the bottom for a tour). Here's a mars from earth example - http://imgur.com/TeX1yRn http://imgur.com/TeX1yRn