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Animation of the retrograde motion of Mars in 2003. Source: Wikimedia Commons, http://en.wikipedia.org/wiki/File:Apparent_retrograde_motion_of_Mars_in_2003.gif License: CC-BY-SA
This resource was reviewed using the Curriki Review rubric and received an overall Curriki Review System rating of 3, as of -0001-11-30.
This resource received a 3* rating because it is part of the larger resource A Tour of the Universe, which received a rating of 3-Exemplary in the Curriki Review System. You can learn more about this larger resource by reading its review and comments.