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Mars Exploration Rovers Update:Opportunity Climbs to Greeley Haven for Winter, and We Look Back at 2011

A.J.S. Rayl • December 31, 2011

As New Year's Eve moved from time zone to time zone across planet Earth, the Mars Exploration Rover (MER) team looked to 2012 and wrapping its eighth Earth year of exploring, while up on the Red Planet Opportunity settled into the "saddle" at Greeley Haven preparing for the onslaught of its fifth Martian winter.

Mars Exploration Rovers Special Update: Opportunity Finds Best Evidence Yet for Liquid Water in Gypsum at Homestake

A.J.S. Rayl • December 07, 2011

Mars Exploration Rover Opportunity has discovered gypsum and its "single most powerful piece of evidence for liquid water on Mars."

Mars Exploration Rovers Update:Opportunity Crunches Homestake, Scouts Locales for Winter

A.J.S. Rayl • November 30, 2011

Opportunity roved toward the end of its eighth year of exploration on the Red Planet and chalking up yet another "exciting" textbook discovery for the Mars mission.

Mars Exploration Family Portrait

Emily Lakdawalla • November 23, 2011 • 1

Jason Davis put together this neat summary of the checkered history of Mars exploration.

Curiosity in context: Not exactly "Viking on wheels," but close

Emily Lakdawalla • November 21, 2011

As I was beginning my research for my two magazine articles on the Curiosity rover's upcoming mission to Mars, I needed to figure out for myself how exactly this gigantic, ungainly machine fit in to the context of past Martian missions.

Mars Exploration Rovers Update: Opportunity Heads for New Discovery as Winter Blows In at Cape York

A.J.S. Rayl • October 31, 2011

Opportunity roved on this month, driving alongside the rim of Endeavour Crater toward the northern end of Cape York in search of more science gold and a place to hunker down for winter.

Mars Exploration Rovers Update: Opportunity Digs In at Endeavour Crater, Team Remembers 9/11

A.J.S. Rayl • September 30, 2011

Since leaving the plains of Meridiani, pulling up to Endeavour Crater and checking out its first rock last month, Mars Exploration Rover Opportunity has wasted no time in getting the "new mission" underway.

The latest HiRISE view of Opportunity, on Endeavour's rim

Emily Lakdawalla • September 24, 2011

In a now-routine act of obtaining detailed photographs of robots from Earth sitting on the surface of another planet, the HiRISE camera on Mars Reconnaissance Orbiter has captured a view of Opportunity sitting on the rim of Endeavour crater.

Mars Exploration Rover Update: Opportunity Finds Martian Mystery at Endeavour Crater

A.J.S. Rayl • September 01, 2011

More than seven and a half years after landing, Opportunity arrived at its long-anticipated destination, the rim of Endeavour Crater, and in less than three weeks found something strange enough to launch a new Martian mystery.

Mars Exploration Rovers Update: Opportunity Arrives at Endeavour Crater, Mission Begins Anew

A.J.S. Rayl • August 31, 2011

The Mars Exploration Rover (MER) mission roves back into the exploration spotlight this month as Opportunity arrives at the rim of Endeavour Crater, a destination that wasn't even an impossible dream when the rover landed back in January 2004.

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