05 February 2014

Mars for the day


Jonathan Amos, science correspondent for BBC News, has an article about the Mars rover:
The Mars rover Curiosity looks set to try to drive over a one-meter-high dune. The sand bank is currently blocking the robot's path into a small valley and a route with fewer of the sharp rocks that lately have been making big dents in the vehicle's aluminium wheels.
US space agency engineers will take no risks, however. The rover will be commanded initially to climb only part way up the dune, to see how it behaves.
The team is mindful that NASA's Spirit rover was lost in a sand trap in 2009. And the Opportunity rover, which has just celebrated ten working years on the planet, very nearly went the same way in 2005 when it became stuck for several weeks in a deep dirt pile later dubbed Purgatory Dune.
The robot would have no problem managing the incline, but mission planners will be concerned about the potential for any rocks hidden inside the dune to damage or snare Curiosity.
Engineers believe the path ahead between two scarps referred to as Dingo Gap will be kinder on the rover's fifty-centimeter-diameter wheels.
These have been taking a hammering during the one-ton vehicle's traverse across the base of Mars' equatorial Gale Crater. Recent close-up pictures reveal multiple punctures, rips and dimples in Curiosity's metal "tyres".
Getting through Dingo Gap would allow the rover to access smoother ground as it heads towards future science targets.
The next of these is a location called KMS-9, where scientists hope to drill into freshly exposed bedrock and look for traces of any complex carbon chemistry that might be present. Such signatures would add to the picture being built of Gale as a place where microbial life could have flourished billions of years ago.
Curiosity's ultimate goal is to get to the foothills of the big mountain that dominates the crater floor. This is still several kilometres to the south and west of its present location.
Since landing in August of 2012, the robot has clocked almost five kilometers on its odometer.
Rico says at its current blazing speed, it's gonna be awhile before Curiosity makes it to the foothills...

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