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Mars Exploration Rovers Update: Efforts to Recover Spirit Expand as Opportunity Wraps Up Work at Santa Maria

A.J.S. Rayl • February 28, 2011

The Mars Exploration Rover (MER) mission emerged from its third solar conjunction this month and, as March roars in, is embarking on its 86th month on the Red Planet. While Opportunity roved away from a surface target it had been studying at Santa Maria Crater and on to an intriguing blue boulder, JPL engineers on Earth stepped up their efforts to recover Spirit, which has been silent, ostensibly in hibernation mode, since late March, nearly one year ago.

Mars Exploration Rovers Update: Mission Celebrates 7 Years of Exploration

A.J.S. Rayl • January 31, 2011

Seven years ago this month, Spirit bounced down onto the surface of the Red Planet, rolled to a stop upright, and beeped home, ready to roll. Three weeks later, Opportunity not only bounced down safely and right into a small crater, but opened its "eyes" to see what the Mars Exploration Rovers had been sent to find signs that water had once flowed there.

"A genuinely weird experience": A video of Steve Squyres explaining a photo of Steve Squyres

Emily Lakdawalla • January 12, 2011

In a lovely talk, in his uncommonly engaging way, Steve Squyres presents the portrait of him that now hangs in the Smithsonian's National Portrait Gallery.

Mars Exploration Rover Update: Spirit Silent Still, Opportunity Savors Santa Maria, We Flashback on 2010

A.J.S. Rayl • December 31, 2010

The Mars Exploration Rovers are wrapping up another year of exploring their seventh -- having experienced both the best of times and the worst of times: Spirit continued a 10-month struggle to endure its coldest, harshest Martian winter yet; Opportunity set a new record for driving despite an arthritic front wheel and a broken shoulder, putting more miles on her rocker bogie in 2010 than in any other single year.

Door 17 in the 2010 advent calendar

Emily Lakdawalla • December 17, 2010

Time to open the seventeenth door in the advent calendar. Where in the solar system are these strange promontories?

Mars Exploration Rovers Update: Mission Looks Back in Honor to Apollo 12, and Drives Exploration Onward

A.J.S. Rayl • November 30, 2010

The Mars Exploration Rovers (MER) forged on in November, their 83rd month of an expedition originally planned for three months: Spirit remained silent at Gusev Crater presumably still re-charging her batteries, as Opportunity roved through a field of craters pressing on toward Endeavour Crater, quietly claiming title along the way to being the first roving robot to drive 25 kilometers on Mars.

Mars Exploration Rovers Update: Spirit Remains Silent, Opportunity Pushes on to Endeavour

A.J.S. Rayl • October 31, 2010

For the Mars Exploration Rovers, October was a lot like September, which was a lot like August: Spirit continued hibernating at Gusev Crater or so it appears since the rover didn't phone home; and Opportunity picked up the pace to Endeavour Crater again, setting new driving records and marking more milestones along the way.

Crack the code for a message from Mars, redux

Emily Lakdawalla • October 14, 2010

Waaaay back when Spirit and Opportunity landed on Mars in January 2004, the Planetary Society helped the public participate in the missions with a number of projects, including one where we printed "secret codes" around the edges of the two names-bearing DVDs that were bolted to the Mars Exploration Rover landers.

Mars Exploration Rovers Update: Spirit Snoozes through September , Opportunity Bolts Past Halfway Mark to Endeavour Crater

A.J.S. Rayl • September 30, 2010

As Opportunity picked up the pace to Endeavour Crater this month and crossed the halfway point on the long journey from Victoria Crater and Spirit continued sleeping in hibernation mode, the Mars Exploration Rovers chalked up their 81st month of what was supposed to have been just a three-month tour of the Red Planet.

Mars Exploration Rovers Update: Spirit Hibernates Still, Opportunity Pulls into Cambridge Bay

A.J.S. Rayl • August 31, 2010

With the Sun beginning to warm the landscape in the southern hemisphere of the Red Planet and winds whipping up here and there forming dust devils that kick the powdery, rust-colored topsoil into the atmosphere, the Mars Exploration Rovers have been experiencing sure signs of a Martian spring this month.

Mars Exploration Rovers Update: Spirit Sleeps Soundlessly, Opportunity Turns a Corner

A.J.S. Rayl • July 31, 2010

Winter lingers in the southern hemisphere of the Red Planet, but the Sun is beginning to rise higher in the sky and temperatures are slowly rising, signs the Mars Exploration Rovers are heading into spring. While Spirit continued hibernating, Opportunity took in the warmth of the Sun, captured its first dust devil, and picked up the pace in Meridiani Planum on the long journey to Endeavour Crater. Together, the rovers marked six and a half years of exploration.

JPL begins actively hailing Spirit -- but is trying to manage your expectations (an editorial)

Emily Lakdawalla • July 30, 2010

Spirit hasn't talked to Earth since March 22 -- so what new information could they have received that would make them pronounce Spirit's possible death? Is there some new analysis of the last bit of telemetry? Some new model indicating Spirit's survival was less likely than previously thought?

Mars Exploration Rovers Update: Spirit Rests on Big Find, Opportunity Finishes Half-Marathon on Way to Endeavour

A.J.S. Rayl • June 30, 2010

With winter still freezing the southern hemisphere of Mars, June might have been an uneventful month for your average working robot, but not the Mars Exploration Rovers (MERs). In fact, from the sounds of silence to a major discovery to an injury scare, the rovers' latest trials, tribulations and achievements, have turned the last four weeks into something of an emotional roller-coaster for some members of the MER team.

Mars Exploration Rovers Update: Spirit Team Announces Major Water Discovery

A.J.S. Rayl • June 17, 2010

Mars Exploration Rover Spirit continued to hibernate this month, parked in place near an old volcanic formation called Home Plate. At the same time though she managed to rove back into the planetary exploration spotlight when a group of the mission scientists announced they had found -- in data from an outcrop the rover visited more than four years ago -- evidence for a past watery environment more suitable for life than any other either Spirit or Opportunity have found, a place where near-pure water existed. 1

Big hunks of carbonate rock on Mars at last

Emily Lakdawalla • June 10, 2010

Carbonate rocks should be all over Mars. But it's been hard to find carbonates—surprisingly so.

Mars Exploration Rovers Update: Spirit Sleeps through Solstice, Opportunity Cruises Past Viking Record

A.J.S. Rayl • May 31, 2010

The Mars Exploration Rovers made it through their fourth winter solstice in what is the coldest, most challenging Martian winter the twin robot field geologists have experienced.

Happy solstice -- on Mars

Emily Lakdawalla • May 13, 2010

It's the solstice on Mars today: summer in the north, winter in the south.

Space carnival, rover update, Planetary Radio Live!

Emily Lakdawalla • May 03, 2010

Just a linky post today, as I am nanny-less.

Mars Exploration Rovers Update: Spirit Snoozes Past Viking, Opportunity Snaps Endeavour on Horizon

A.J.S. Rayl • April 30, 2010

The Mars Exploration Rovers' fourth Martian winter is proving to be the harshest one yet and Spirit and Opportunity are getting colder than ever before. With temperatures on the Red Planet dropping in April and the Martian winter solstice still two weeks away, the season has turned into a shivering nail-biter.

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