This picture might help: http://starryskies.com/The_sky/events/mars/earth.jupiter.orbits.gif http://starryskies.com/The_sky/events/mars/earth.jupiter.orb... (F

This picture might help: http://starryskies.com/The_sky/events/mars/earth.jupiter.orbits.gif http://starryskies.com/The_sky/events/mars/earth.jupiter.orb... (Found on the reddit page linked at the end of the article.)