In two months, Comet ISON will make a spectacular flyby of the sun. First, though, it has to fly by Mars. The sungrazing comet is approaching the Red Planet for a 0.07 AU close encounter on October 1st. Mars satellites and rovers will have a close-up view. A video from NASA details the encounter.
Amateur astronomers on Earth can watch, too. Using a remotely controlled 14-inch telescope in New Mexico, Rolando Ligustri photographed ISON approaching Mars on September 28th:
