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Mars Exploration Rovers Update: Spirit and Opportunity Celebrate Christmas by Working

A.J.S. Rayl • December 21, 2004

The Mars Exploration Rovers are trudging ever onward through the dead of winter on the Red Planet dreaming, perhaps, if robots dream, of a white Christmas. But Spirit and Opportunity are robots after all and come this weekend "the poor little rovers will have to keep working, even on Christmas," MER Project Scientist Joy Crisp, of the Jet Propulsion Laboratory (JPL), told The Planetary Society earlier today.

Mars Exploration Rovers Update: Spirit Climbs up Husband Hill as Opportunity Returns to Karatepe to Exit Endurance Crater

A.J.S. Rayl • December 09, 2004

The Mars Exploration Rovers are roving ever on into new territories and deeper into the history books as they close in on the end of one full Earth year of active duty at their respective sites on Red Planet.

Mars Exploration Rovers Update: Spirit Climbs toward Uchben Opportunity Picks up Power while at Wopmay

A.J.S. Rayl • October 22, 2004

As winter gives way to spring on the Red Planet, the Mars Explorations Rovers are maintaining their 5-day a week work schedules and continuing to send surprises home to Earth. Despite a recurring 'ache' in one of her steering motors, Spirit is continuing her climb in the Columbia Hills toward a rock called Uchben, while her twin, Opportunity, is completing her work at Wopmay.

Mars Exploration Rovers Update: Rovers Expand the Water Story as Spirit Gets Back to Climbing and Opportunity Stops at Wopmay

A.J.S. Rayl • October 08, 2004

The Mars Exploration Rovers are returning more and more evidence that there was liquid water on Mars at some point in the distant past, team members reported at a telecom news briefing yesterday.

Mars Exploration Rovers Update: Spirit Sits with Steering Glitch, Opportunity Makes Tracks Toward Burn's Cliff

A.J.S. Rayl • October 06, 2004

The worst of the Martian winter is over for the Mars Exploration Rovers, but the robots' own dark days appear to be looming as Spirit hits a 'bump' that's kept her at a standstill for a week now.

Mars Exploration Rovers Update: Spirit and Opportunity Roving Again as NASA Extends Tours of Duty

A.J.S. Rayl • September 23, 2004

After nearly two weeks of sparse, infrequent communication, Spirit and Opportunity have survived winter solstice and resumed "reliable" contact with Earth and the Mars Exploration Rover team -- and NASA has extended funding for an additional six months of operations, as long as the little robot geologists keep working, space agency officials announced late Tuesday.

Mars Exploration Rovers Update: Spirit Roves onto "Best" of Martian Bedrock, Evidence of "Much More Water" as Opportunity Uncovers Bizarre Geologic 'Popcorn'

A.J.S. Rayl • August 19, 2004

During the last four weeks, the Mars Exploration Rovers have braved the Martian winter to continue their geologic field work, sending home more evidence of past liquid water on the Red Planet and images of bizarre geologic formations the likes of which no one has seen before.

Mars Exploration Rovers Update: Spirit Finds Hematite Opportunity Discovers Signs of More Water

A.J.S. Rayl • June 25, 2004

As the Martian winter descends on Gusev Crater and Meridiani Planum, the Mars Exploration Rovers have hit the snowless slopes.

Mars Exploration Rovers Update: Rovers Go Up Hills, Down a Crater, and May be Showing Signs of Age

A.J.S. Rayl • June 15, 2004

The twin rovers Spirit and Opportunity continue their trek across the varied surface of the Red Planet, climbing hills and descending into a crater. After a two-month journey of over 3 kilometers through rocky terrain, Spirit has now begun climbing the Columbia Hills, which were seen on the horizon in the early panoramas taken from the landing site. The rover is expected to spend much of its remaining life climbing the hills and analyzing their geological make-up. Meanwhile, on the other side of the planet, Opportunity is carefully descending into the stadium-sized depression dubbed "Endurance Crater" by the MER team. The rocky formations revealed on the slopes of the crater promise to provide some of the richest sources for studying the geological history of Mars.

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