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Our journalists and guest bloggers bring you stunning imagery and the space stories that matter most.

Field Report from Mars: Sol 3902 - January 15, 2015

Larry Crumpler • January 22, 2015

Larry Crumpler gives an update on the status of Opportunity's traverse toward Marathon Valley.

Mars Exploration Rovers Update: Opportunity Closes in on 11th Anniversary and We Look Back on 2014

A.J.S. Rayl • January 07, 2015 • 3

With a wonder year of discoveries, historic feats, and bummers in the rear view mirror – and plenty of mettle to continue exploring – Opportunity ended 2014 quietly working in a temporary back-up mode, as her colleagues on Earth ramped up for the mission's marathon adventure to come in 2015.

Field Report from Mars: Sol 3875 – December 18, 2014

Larry Crumpler • December 30, 2014 • 2

Opportunity is continuing its drives along the rim of Endeavour toward Marathon Valley. Larry Crumpler tells us what to expect as the rover continues its journey.

Mars Exploration Rovers Update: Opportunity Roves from Wdowiak Ridge into Network of Fractures

A.J.S. Rayl • December 03, 2014 • 1

Last month, the Earth's longest-lived and most traveled robot on another planet drove into a network of fractures the likes of which the scientists had never seen before on Mars and wound up working there through the end of the month – and then something not completely unexpected happened.

Field Report from Mars: Sol 3848 — November 20, 2014

Larry Crumpler • November 25, 2014

Larry Crumpler returns with an update on Opportunity's recent activities, and its road ahead.

Mars Exploration Rovers Update: Opportunity Images Comet, Ducks Storm, Departs Ulysses

A.J.S. Rayl • November 04, 2014

As winds whirled and converged to the west of Endeavour Crater, Opportunity's power dropped dramatically in October, but the Mars Exploration Rover (MER) pressed on. By month's end, the robot field geologist had completed her assignments – including capturing the first close-in shot of a comet from the surface of the Red Planet – and was roving onward through the darkness, driving the mission into the 130th month of what started out more than 10-and-a-half years ago to be a 3-month tour.

Seven Mars spacecraft attempted observations of comet Siding Spring. How did they go?

Emily Lakdawalla • November 03, 2014 • 6

It's been two weeks since comet Siding Spring passed close by Mars, and six of the seven Mars spacecraft have now checked in with quick looks at their images of the encounter. I round up all the results.

A (Difficult) Day in the Solar System

Bill Dunford • October 30, 2014 • 13

After a bad day on the launch pad, some perspective.

Status update: All Mars missions fine after Siding Spring flyby

Emily Lakdawalla • October 20, 2014 • 2

All seven Mars spacecraft are doing perfectly fine after comet Siding Spring's close encounter with Mars.

Field Report from Mars: Sol 3808 — October 10, 2014

Larry Crumpler • October 15, 2014 • 1

Opportunity will become a comet flyby mission beginning in mid-October. The comet Siding Spring will zoom past Mars at a distance of about 135,000 km on October 19.

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