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Stories, updates, insights, and original analysis from The Planetary Society.

Mars Exploration Rover

The Mars Exploration Rovers Update: Spirit Presses On, Opportunity Roves On as Martian Winter Sets In

As Phoenix commanded the headlines with its flawless touchdown in the arctic region of the Red Planet this past month, the Mars Exploration Rovers (MERs) forged onward slowly, quietly and out of the spotlight, heading into the depths of their third Martian winter. Spirit persevered and held its own in terms of energy, while Opportunity, after six weeks of being stopped in its tracks with a shoulder joint injury, roved once more.

Dawn in survey orbit at Ceres

Dawn Journal: Ion Propulsion

The Dawn mission continues smoothly, as the spacecraft reliably thrusts with its ion propulsion system, demonstrating all the patience of a...well, of an ion-propelled spacecraft!

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