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Stories, updates, insights, and original analysis from The Planetary Society.
Mastcam-Z team blog: Preparing for five-hour operations
It takes hundreds of scientists and engineers many years to design and build just one instrument for a Mars mission. In the first Mastcam-Z team blog post, we'll talk about the special challenges we expect for Mars 2020 operations, and how we're planning to overcome them.
#DPS2017: Progress report on Mars Reconnaissance Orbiter images of comet C/2013 A1 Siding Spring
Three years ago, on October 19, 2014, comet C/2013 A1 Siding Spring passed within 138,000 kilometers of Mars. At the 2017 meeting of the Division for Planetary Sciences of the American Astronomical Society, we heard a progress report on Mars orbiter imaging of the comet's nucleus.
Mars Exploration Rovers Update: Opportunity Braves Onset of Winter to Picture Perseverance
The Martian winter began to grip Endeavour Crater in September, slowing Opportunity's pace. But she braved the brutal cold in Perseverance Valley and followed her commands to visually document everything in sight.
A new year's worth of Mars Orbiter Mission data
India's Mars Orbiter Mission has now completed three years in orbit at Mars, and ISRO celebrated the anniversary by releasing the mission's second-year data to the public. Emily Lakdawalla spent a week downloading and processing data for your enjoyment.
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.
Curiosity update, sols 1726-1813: Surveying Vera Rubin Ridge from below
Curiosity had a productive three months driving along the front of Vera Rubin Ridge, gathering photos and data with its arm instruments, finally driving up on to the ridge on sol 1809.
Curiosity's balky drill: The problem and solutions
Since December 1, 2016, Curiosity has been unable to drill into rocks because of a serious problem with one of the drill's motors. Emily Lakdawalla thoroughly explains the issues and the path forward for Curiosity.
Book Update: The Design and Engineering of Curiosity
Emily Lakdawalla's first book is now available for pre-order.
Mars Exploration Rovers Update: Opportunity Ventures Deeper into Perseverance
Along the western rim of Endeavour Crater, Opportunity forged onward in August vicariously taking the Mars Exploration Rovers team – along with a global contingent of mission observers all around Earth – downhill into Perseverance Valley and deeper into a new chapter in this legendary expedition of the Red Planet.
A future comes into focus for the Mars Exploration Program
Casey Dreier says NASA's decision to pursue a Mars sample return mission is good news for Mars fans, Mars scientists and supporters of the decadal survey process.
NASA considers kicking Mars sample return into high gear
Thus far, no plan has solidified on how to get soil and rock samples from the upcoming Mars 2020 rover back to Earth. That is starting to change.
Five Earth Years on Mars
Five (Earth) years ago today, the Mars Science Laboratory Curiosity landed in a dramatic fashion on the surface of the Red Planet. We look back at a mission that advanced humanity's understanding of Mars and provided a priceless return on a modest investment.
Mars Exploration Rovers Update: Opportunity Enters Perseverance Valley, Settles in for Solar Conjunction
After struggling to get her left front wheel unstuck in June, Opportunity quickly adapted to a new driving strategy and unabashedly cruised into Perseverance Valley in July.
Congress gives NASA's planetary science division some love (and a Mars orbiter)
The House of Representatives proposed $2.1 billion for NASA's planetary science budget, which would be an all-time high. Part of the increase would be used to start work on a new reconnaissance and communications orbiter.
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.
Mars Exploration Rovers Update: Opportunity Sprains ‘Ankle’ but Perseveres on Walkabout
The autumn skies over Endeavour Crater remained hazy as dust from the summer storms continued to rain down, but Opportunity encountered some unexpected and serious June gloom when her right front steering wheel jammed during the walkabout atop Perseverance Valley.
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.
Curiosity update, sols 1675-1725: Traverse to Vera Rubin Ridge
Curiosity has had a busy eight weeks, driving south from the Bagnold Dunes toward Vera Rubin Ridge. The path has steepened and the rover is now rapidly climbing upward with every meter traveled. It's been a productive time for arm instruments, but the drill is still not working.
Mars Exploration Rovers Update: Opportunity Shoots the Moon on Arrival at Perseverance Valley
In another dynamic demonstration of what can be achieved when a team works together, Opportunity cruised to the top of Perseverance Valley, shot the moon, and drove into her 160th month of surface operations in May.
Field Report from Mars: Sol 4734
Opportunity has arrived at the head of Perseverance Valley—a possible water-cut valley.



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