Posted by tourdemars to Mars Exploration Rovers at October 12, 2007 12:57 PM

The Mars Exploration Rovers have weathered two drab winters on the Martian surface, and mission managers are already looking ahead to yet a third chilly season. All this from a mission that was only designed to last 90 days. The Spirit rover is searching for a spot to stick it out during the upcoming Martian winter, which will last from March 2008 through October 2008, according to a statement from NASA's Jet Propulsion Laboratory in Pasadena, Calif. Although Mars has a tilt similar to Earth's, Martian seasons last longer because the planet takes almost twice as long to circle the Sun—almost 687 Earth days.