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

Spirit gets brushed off

There was great news last night from Mars Exploration Rover mission operations: Spirit seems to have enjoyed another

Windows Onto the Abyss: Cave Skylights on Mars

Today's set of image releases from the Mars Reconnaissance Orbiter HiRISE team included this one, of a fairly bland-looking lava plain to the northeast of Arsia Mons. Bland, that is, except for a black spot in the center.

Millions of soundings yield clues to Mars' weather

Two months after the start of Mars Reconnaissance Orbiter's primary science phase, the Mars Climate Sounder instrument has already acquired more than four million soundings, building toward a vast data set on the three-dimensional structure of Mars' atmosphere over the full Martian year of the orbiter's nominal mission.

Rosetta Was Here

This amazing view was captured by the CIVA camera on Rosetta's Philae lander just four minutes before its closest approach to Mars on February 25, 2007. The spacecraft was only 1,000 kilometers above the planet.

Autumn comes to Mars' north pole

It's easy to forget that Mars is another such world with cloudy weather and seasonally varying climate. This lovely image release from the CRISM instrument on Mars Reconnaissance Orbiter brings that point home.

Get used to this view

Get used to this view of Home Plate and Husband Hill, because Spirit will be seeing a lot of it over the next 8 months, whenever power levels permit the rover to eke a little bit of science activity out of the day.

A debate in Meridiani Planum

There was a big news splash about two articles that appeared in Nature about Mars Exploration Rover Opportunity's landing site. The articles suggest two theories for the formation of the layered sulfur-rich deposits at Meridiani Planum that do not involve standing liquid water.

NOW Mars is spectacular

Back in August, there was a false alarm being circulated by email that Mars was going to be super-close to Earth on August 27.

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