For a probe intended to last 90 Martian Days (and 600m), that it has lasted 4,000 Martian Days (and 42km) is worth more a bit of applause.
Mars Exploration Rovers Update: Opportunity Logs Sol 4000, Digs Spirit of St. Louis Crater
After investigating some flat, light and dark toned rocks around Spirit of St. Louis Crater in April, Opportunity chalked up another milestone achievement – the 4000th sol or Martian day of surface operations.
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