[[File:lighterstill.jpg]][[File:Apparent_retrograde_motion.gif|center|frame|<center>Motion of [[Sun]], [[Earth]], and Mars according to heliocentrism (left) and to geocentrism (right), before the Copernican-Galilean-Newtonian revolution. Note the retrograde motion of Mars on the right. Yellow dot, Sun; blue, Earth; red, Mars.</center>]] | [[File:lighterstill.jpg]][[File:Apparent_retrograde_motion.gif|center|frame|<center>Motion of [[Sun]], [[Earth]], and Mars according to heliocentrism (left) and to geocentrism (right), before the Copernican-Galilean-Newtonian revolution. Note the retrograde motion of Mars on the right. Yellow dot, Sun; blue, Earth; red, Mars.</center>]] |