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Rovers Examine Hills, Crater in Bonus-Time
In mission bonus time, Spirit and Opportunity continue to study rocks and craters, gathering clues about Mars' ancient environment.
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Opportunity Begins 'Deep Sleep' Mode →
Shutting down more completely overnight will conserve enough battery charge to add several hours of science operations during the day, but there is an increased risk scientific instruments may be damaged.
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Mars Rover Inspects Stone Ejected From Crater →
NASA's Mars Exploration Rover Opportunity has begun sampling rocks blasted out from a stadium-sized impact crater the rover is circling, and the very first one may extend our understanding about the region's wet past.
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Opportunity Arrives at Tempting Crater →
Scientists and engineers celebrated when they saw the first pictures NASA's Opportunity sent from the rim of a stadium-sized crater that the rover reached after a six-week trek across martian flatlands.
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Rovers Finish Primary Mission And Roll Onward
Spirit and Opportunity have completed their originally planned mission and are tackling extra-credit assignments.
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Electric Martian Dust Devils
Research indicates that static electricity on Mars could potentially cause increased dust adhesion to space suits and equipment.
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Rover Finds Rock Resembling Meteorites →
NASA's Opportunity rover has examined an odd volcanic rock on the plains of Mars' Meridiani Planum region with a composition unlike anything seen on Mars before, but scientists have found similarities to meteorites that fell to Earth.
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Rovers Refreshed and Ready to Rock
Both rovers are now operating with new "minds," after successful software updates
› Spirit Software →
› Opportunity Software →
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Mars Rovers' Mission Extended
The Mars Exploration Rovers will work five months beyond their three-month prime mission.
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Spirit Achieves Mission Success →
Spirit has now completed 90 sols (martian "days") of surface operations, allowing mission scientists to check off the rover's last box for mission success.
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Mars Success Honored At Disney
Administrator O'Keefe, a Mars rover and others help Disney celebrate the success of Spirit and Opportunity.
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Spirit Finds Water Hints at Gusev →
Clues from a wind-scalloped volcanic rock on Mars investigated by NASA's Spirit rover suggest repeated possible exposures to water inside Gusev Crater.
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Mineral in Mars 'Berries' Adds to Water Story →
A major ingredient in small mineral spheres analyzed by NASA's Mars Exploration Rover Opportunity furthers understanding of past water at Opportunity's landing site.
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Rovers Watching Solar Eclipses
The eclipse-watching campaign began this month with Opportunity's panoramic camera view of Mars' smaller moon, Deimos.
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Sunset Clip from Opportunity Tells Dusty Tale →
Dust gradually obscures the Sun during a blue-sky martian sunset seen in a sequence of newly processed frames from NASA's Mars Exploration Rover Opportunity.
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Opportunity Examines Trench as Spirit Prepares to Dig One →
NASA's Opportunity rover is finding some unexpected things in a martian trench, while Spirit is getting set for its own dig at "Laguna Hollow."
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Spirit Talks to Europe's Mars Express
On February 6, Mars Express orbiter transferred commands from Earth to the rover and relayed data from the robotic explorer back to Earth.
› View This Video -
'Blueberry Muffins' on Mars? →
NASA's Spirit rover has begun making some of its own driving decisions while its twin, Opportunity, is presenting scientists with decisions to make about studying small spheres embedded in bedrock, like berries in a muffin.
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Mars Exploration Rover Mission Status →
NASA's Opportunity rover drove about 3.5 meters (11 feet) toward a rock outcrop in the wall of a small crater on Mars; its twin, Spirit, has successfully reformatted its flash memory
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Opportunity Sees Tiny Spheres in Martian Soil →
NASA's Opportunity has examined its first patch of soil in the small crater where it landed and found strikingly spherical pebbles among the mix of particles there.