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

Sand Waves in the Desert

I have a pet peeve: the words dune and ripple are often used interchangeably, although they are quite distinct from one another. So what’s the difference between aeolian dunes and ripples? And why should anybody care?

New Hills, Old Secrets

Exploring a set of newly named hills on Mars reveals tantalizing clues to the planet's story.

Mars 2020 Is No Redo

The next major mission to Mars will push the technological envelope in way that preserves its budget and fulfills the scientific goals set by the planetary community for this decade.

A new comet observing campaign for C/2013 A1 (Siding Spring)

You thought you were rid of us...but we're back! Following the spectacular and, quite frankly unprecedented, success of the Comet ISON Observing Campaign, we are launching a similar venture for another unique cometary encounter that's happening this year. In October 2014, comet C/2013 A1 (Siding Spring) will pass extremely close to Mars.

Curiosity images "Dingo Gap," sols 519-521

Over the last few days, Curiosity made steady driving progress to the southwest. For several of those days, an intriguing feature has appeared on the horizon in her images. UPDATE: The Curiosity team has now decided to drive the rover toward the feature, which is now named

Curiosity update, sols 488-520: Steady driving while watching the wheels

In the last month, Curiosity put 222 meters on the odometer in 12 short drives, while regularly assessing the wheels for damage. The rover performed touch-and-go analyses of rocks including Oneida and Kodak, and also took some ChemCam RMI mosaics of rocks near the base of Mount Sharp.

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