Stories, updates, insights, and original analysis from The Planetary Society.
Field Report from Mars: Sol 4857
Opportunity is continuing its drive down Perseverance Valley, a possible channel that was cut in the inner wall of the 22 km-diameter Endeavour impact crater on ancient Mars.
Field Report from Mars: Sol 4782
With the latest drive on sol 4782, Opportunity began the long drive down the floor of Perseverance Valley here on Endeavour Crater.
Field Report from Mars: Sol 4766
Opportunity is doing a geologic walkabout at the entrance to Perseverance Valley, an ancient and potentially water-carved feature.
Field Report from Mars: Sol 4734
Opportunity has arrived at the head of Perseverance Valley—a possible water-cut valley.
Field Report from Mars: Sol 4718
Opportunity has made the final drive in the month-long process that began way up north inside Endeavour Crater earlier this Earth-year.
Field Report from Mars: Sol 4669
Opportunity has begun driving down a long southward slope in Endeavour, heading toward Perseverance Valley.
Field Report from Mars: Sol 4662 - March 6, 2017
For nearly two years, Opportunity's world has been tilted 10–25 degrees as it drove down to the lower slopes of the wall of Endeavour Crater. Toward the end of last week, Opportunity pulled itself up and over the lip of the crater.
Field Report from Mars: Sol 4639 - February 10, 2017
Opportunity has successfully clawed its way to within a few meters of the crater rim after spending the last few months climbing and the last two years inside the crater.
Field Report from Mars: Sol 4633 - February 6, 2017
Several sols ago, Opportunity made it up and past the steepest section of its climb out of Endeavour crater.
Field Report from Mars: Sol 4588 - December 20, 2016
Opportunity continues to climb up the inner crater wall of Endeavour crater, heading south on its journey toward its next valley target.
Field Report from Mars: Sol 4577 - December 9, 2016
Opportunity has begun the ascent of the steep slopes here in the inner wall of Endeavour crater after completion of a survey of outcrops close to the crater floor. The goal now is to climb back to the rim, drive south, and arrive at the next major mission target on the rim before the next Martian winter.
Field Report From Mars: Sol 4535 - October 26, 2016
Opportunity is currently finishing up observations of its first outcrop target of its 10th extended mission plan.
Field Report From Mars: Sol 4482 - September 2, 2016
Opportunity is about to leave Marathon Valley for good and head south into the next valley, marking the beginning of the current extended mission plan.
Field Report From Mars: Sol 4410 - June 20, 2016
Opportunity is finishing up its activities in Marathon Valley, getting ready to hit the road again.
Field Report From Mars: Sol 4365 - May 5, 2016
Opportunity arrived at its current location on sol 4345 to begin investigation of an outcrop on the crest of a ridge near the west end of Marathon Valley.
Field Report From Mars: Sol 4333 - April 1, 2016
Opportunity has climbed west and up Marathon Valley in one of the final campaigns before moving on and beginning the summer field activities to the south southward.
Field Report From Mars: Sol 4284 - February 11, 2016
Opportunity is continuing to explore the outcrops Marathon Valley, on the west rim of Endeavour crater.
Field Report From Mars: Sol 4270 - January 28, 2016
On January 23rd, Opportunity celebrated its 12th anniversary of landing on Mars.
Field Report from Mars: Sol 4119 - August 26, 2015
Opportunity is moving down into a large valley that cuts through the rim of Endeavour crater, into some interesting scenery.
Field Report from Mars: Sol 4060 - June 26, 2015
Larry Crumpler gives an update on the Opportunity rover's activities in Spirit of St. Louis crater.