Earlier today, unnoticed by the vast majority of the world, Opportunity reached and then silently passed a major milestone in her great adventure on Mars. At just before 3am, UK time, Opportunity began her 3000th sol, or martian day, on Mars.
Image magician Daniel Machacek has done it again, producing a jaw-dropping view of Mars from Viking Orbiter 1, featuring a frosty Argyre basin and stretching across to a series of faults called Thaumasia Fossae.
May 16, 2012 is the third martian anniversary of the start of Mars Climate Sounder (MCS) observations from Mars Reconnaissance Orbiter. MCS started measuring the atmosphere of Mars three Mars years ago, on September 24, 2006. We can now compare the weather and behavior of the atmosphere in three different years, and find the temperature differences to be surprisingly large.