Mars is out too leave its phase of good apparition until 2016. Its current trajectory has made Mars appear to be slowing in it path, and on November 15th it is going to stop and turn around as if it has decided that it no longer wants to travel with the Earth. This movement is known as retrograde motion and it has taken astronomers a long time to figure out what makes a star "wander". Mars will stay in this retrograde motion for about 11 weeks, when the illusion of its course change will end and it will continue its normal path around the sky.
http://www.space.com/spacewatch/071109-ns-marsreverse.html
Friday, November 9, 2007
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