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

Pretty pictures of terraced craters on Mars

Check out this unusual crater on Mars. It's not a very big one, less than 500 meters in diameter, and yet it has two rings. Most craters on Mars this size are simple bowl shapes. What's going on here?

New Hills, Old Secrets

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

Book Review: This Is Mars

This is Mars is a stunning book that treats the HiRISE camera on Mars Reconnaissance Orbiter as an art photographer, exploring the variety of shapes and patterns created by wind, water, impacts, and gravity on the Martian surface.

Polar vortices across the solar system

Earth's polar vortex has been in the American news all week. But we're not the only planet that has one; basically every world that has an atmosphere has a polar vortex. Here are lots of pretty pictures and animations of polar vortices.

What's up in planetary missions in 2014

With the New Year upon us, what can we look forward to in 2014? For me, the main event of 2014 is that ESA's Rosetta mission finally -- finally! -- catches up to the comet it has been chasing for a decade. We will lose LADEE, gain two Mars orbiters, and launch Hayabusa2. The year begins with an amazing 24 spacecraft exploring or cruising toward various planetary destinations.

The Mists of Mars

Two grand canyons fill with fog, one on Earth and one on Mars.

Interplanetary eyes on the lookout for comet ISON

Space blogger Daniel Fischer provides a preview of the exciting interplanetary observing campaign that has recently begun to study comet C/2012 S1 (ISON) from vantage points across the solar system.

Mysterious tides in the Martian atmosphere

Observations made by the Mars Climate Sounder, an instrument aboard NASA’s Mars Reconnaissance Orbiter, have revealed new information about atmospheric tides on the Red Planet.

Terra Cognita

Pushing back the frontier, and filling in the blank spaces on the map.

Dunes on Tatooine

The fictional world Tatooine, scene of action in the Star Wars movies, is named after a town in Tunisia, where parts of the movies were filmed. The desert backdrops against which the movies were filmed are real terrestrial landscapes, which prove to be perhaps unexpectedly dynamic.

A new HiRISE view of Opportunity (sol 3361)

The HiRISE camera on Mars Reconnaissance Orbiter has snapped a lovely color photo of the rim of Endeavour crater, catching Opportunity midway between Nobby's Head and Solander Point.

Enormously detailed photo of Kasei Valles from Mars Express

ESA celebrated the tenth anniversary of Mars Express' launch with a several-day science meeting during which they issued lots of press releases and numerous spectacular photos. My favorite of them all is this enormous image of Kasei Valles on Mars.

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