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The Mars Exploration Rovers Update

Since 2004, original interviews, original reporting, and the only regularly published news feature documenting NASA’s first overland expedition of the Red Planet through the adventures and discoveries of Opportunity, Spirit, and the MER team, by A.J.S. Rayl. If you're new to the mission or want a list of all our resources, check out our MER mission page

Mars Exploration Rovers Update: Opportunity Nears End of Murray Ridge, Pillinger Point Christened

A.J.S. Rayl • July 03, 2014 • 6

Opportunity got off to a bumpy start in June, but the Mars Exploration Rover (MER) mission pressed on, continuing the exploration of Murray Ridge at the western rim of Endeavour Crater.

Mars Exploration Rovers Update: Opportunity Hunts Ancient Clays along Murray Ridge

A.J.S. Rayl • June 05, 2014

At the western rim of Endeavour Crater, Opportunity spent the month of May exploring a new clayground along Murray Ridge and the Mars Exploration Rovers (MER) mission trundled into the 125th month of what was originally to be a short, 3-month tour.

Mars Exploration Rovers Update: Opportunity Roves to Next Clay Mine

A.J.S. Rayl • May 02, 2014 • 3

The Mars Exploration Rovers mission cruised toward the Martian spring, Opportunity is powered-up and cleaner than it has been since its first winter on Mars.

Mars Exploration Rovers Update: Opportunity Powers Up in Cook Haven and in Fans' Minds

A.J.S. Rayl • April 07, 2014 • 1

At the Solander Point section of the rim of Endeavour Crater, Mars Exploration Rover Opportunity spent the month of March just off Murray Ridge working on its final targets in Cook Haven and dusting itself in the winds of winter, while MER mission officials on Earth were roving toward what may be the robot's current greatest potential threat – being cut from NASA's planetary science budget.

Mars Exploration Rovers Update: Opportunity Cruises Through Winter Solstice, Into Year 11

A.J.S. Rayl • March 05, 2014

The Mars Exploration Rover mission put its 10th anniversary in the rear view mirror in February and roved on into its 11th year of surface operations at Endeavour Crater.

Mars Exploration Rovers Update: Opportunity Finds Mystery Rock, Mission Celebrates 10 Years

A.J.S. Rayl • February 07, 2014

In the storied history of the Mars Exploration Rovers (MER) mission, January 2014 will likely be remembered as one of the most memorable months of all.

Mars Exploration Rovers Update: Mission Nears 10-Year Milestone, Oppy Roves On, We Look Back on 2013

A.J.S. Rayl • January 07, 2014

Opportunity wrapped a landmark year in December, sending home more evidence of ancient habitable environments at Endeavour Crater as the Mars Exploration Rovers (MER) mission geared up to celebrate an historic milestone – the completion of 10 years of surface operations on the Red Planet.

Mars Exploration Rovers Update: Opportunity Ascends Murray Ridge into Clay Mineral Grounds

A.J.S. Rayl • December 03, 2013 • 1

Although winter took hold at Endeavour Crater in November, Opportunity pressed on, climbing up Murray Ridge and driving into a clay mineral hunting ground as the Mars Exploration Rovers mission cruised another month closer to celebrating its 10th Earth year of surface operations with myriad events throughout January 2014.

Mars Exploration Rovers Update: Opportunity Gets Back to the Past at Winter Site

A.J.S. Rayl • November 04, 2013 • 1

As fall began to give way to winter at Endeavour Crater, Opportunity cruised deeper into her campsite on the western side of Solander Point in October, heading for a site that may contain clay minerals and the rover's next big discovery, and the Mars Exploration Rovers mission trekked another month closer to its 10th anniversary in January 2014.

Mars Exploration Rovers Update: Opportunity Roves to Solander West, into Winter Campground

A.J.S. Rayl • October 07, 2013

The Mars Exploration Rover (MER) mission stepped up preparations for the coming Martian winter in September as Opportunity rounded the northern tip of Solander Point and drove into what will be her campground at Endeavour Crater for the next six months or so. It's been nearly a year in the planning. Now, from the rover's first look around, this winter could turn out to be one for the books.

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Our Mars Exploration Rovers (MER) update has recorded the journeys of the twin rovers Spirit and Opportunity on the surface of Mars since their arrival in January of 2004. It is a treasure trove of information, insight, and high-quality reporting detailing every step of this unprecedented voyage of discovery.

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