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Opportunity Surpasses 20 Kilometers of Total Driving
03.24.10 - NASA's Mars Exploration Rover Opportunity today surpassed 20 kilometers (12.43 miles) of total driving since it landed on Mars 74 months ago.
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Mars Rover Examines Odd Material at Small, Young Crater
03.24.10 - Weird coatings on rocks beside a young Martian crater remain puzzling after a preliminary look at data from examination of the site by NASA's Opportunity rover.
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NASA Mars Rover Getting Smarter as it Gets Older
03.23.10 - Opportunity has a new capability to make its own choices about whether to make additional observations of rocks that it spots on arrival at a new location.
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Rover Spirit Starts a New Chapter on Mars
01.26.10 - After six years of unprecedented exploration of the Red Planet, NASA's Mars Exploration Rover Spirit no longer will be a fully mobile robot.
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Opportunity Rover Gets Glimpse Inside Mars
01.21.10 - NASA's Mars exploration rover Opportunity is allowing scientists to get a glimpse deep inside Mars.
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Free Spirit: Just a Few More Approaches to Try for Extrication
12.22.09 - The list of remaining maneuvers being considered for extricating Spirit is becoming shorter.
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Spirit Reaches 6th Anniversary With Uncertain Future
12.31.09 - NASA's Mars rover Spirit has been on the Red Planet for six years of unprecedented science exploration and inspiration for the American public.
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Free Spirit: Right-Front and Right-Rear Wheels Sit Out Latest Drive
12.22.09 - Spirit's drive on Sol 2120 (Dec. 19, 2009) included commands for using all six wheels. However, the right-front wheel rotated less than 2 degrees and the right-rear wheel did not rotate at all.
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Free Spirit: Right-Front Wheel Rotations
12.17.09 - Spirit's right-front wheel, which had stopped operating in March 2006, revolved with apparently normal motion during the first three of four driving segments on Sol 2117 (Wednesday, Dec. 16) but stopped early in the fourth segment of the drive.
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Unexpected Wheel-Test Results
12.15.09 - Diagnostic tests were run on Spirit's right-rear wheel and right-front wheel on Sol 2113 (Dec. 12, 2009).
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Free Spirit: Rear Wheel Trouble Continues
12.10.09 - Results of diagnostic tests on Spirit's right-rear wheel on Sol 2109 (Dec. 8, 2009) continue to indicate a troubled wheel, which may leave the rover with only four operable wheels.
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No Wheel Stall in Diagnostic Drive
11.25.09 - On Sol 2095 (Tuesday, Nov. 24), Spirit performed a set of diagnostic actions related to a stall of the right-rear wheel on the previous drive, three days earlier.
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Third Extrication Drive Ends With Wheel Stall
11.23.09 - Spirit experienced a wheel stall with the right-rear wheel during the second step of a two-step drive on Sol 2092 (Saturday, Nov. 21).
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Free Spirit: Second Extrication Drive Yields Slight Progress
11.19.09 - After spinning the wheels for the equivalent of 2.5 meters (8.2 feet) in the forward direction, the center of the rover moved approximately 12 millimeters (0.5 inch) forward, 7 millimeters (0.3 inch) to the left and about 4 millimeters (0.2 inch) down.
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Free Spirit: Second Planned Extrication Drive is Straight Ahead Again
11.18.09 - Because the first extrication drive for Spirit, on Sol 2088 (Nov. 17), stopped as soon as it began due to an exceeded tilt limit, the plan for an extrication drive on Sol 2090 (Nov. 19) will essentially be a repeat of the first drive plan, but with improved rover attitude knowledge.
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Free Spirit: Tilt Parameters End First Extrication Drive
11.17.09 - The preliminary results from the first extrication drive for Spirit on Sol 2088 (Nov. 17, 2009) indicate the rover stopped less than 1 second after it began, sensing more vehicle lateral tilt than permitted.
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NASA to Begin Attempts to Free Sand-Trapped Mars Rover
11.12.09 - NASA will begin transmitting commands to its Mars exploration rover Spirit on Monday as part of an escape plan to free the venerable robot from its Martian sand trap.
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Free Spirit: Tests Prepare to Extract Rover
10.19.09 - Engineers using test rovers on Earth to prepare for extracting the sand-trapped Spirit rover on Mars have added a new challenge to their preparations.
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Free Spirit: Computer Modeling and Dusty Testing
09.14.09 - Tests on Earth simulating Spirit's predicament on Mars have reinforced understanding that getting Spirit to rove again will be very difficult.
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Free Spirit: Dust Storm Passing Over Spirit
08.25.09 - The amount of electricity generated by the solar panels on Spirit has been declining for the past several Martian days, or sols, as a regional dust storm moved southward and blocked some of the sunshine at Spirit's location.