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Message: <blockquote data-quote="nismok" data-source="post: 6403669" data-attributes="member: 109094"><img src="http://i.i.com.com/cnwk.1d/i/tim//2010/01/12/spirit4_362x362.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" />The view from the Spirit rover looking north, back along its path, from the point where it got trapped last April. The rover is believed to be straddling the rim of a hidden crater. Note the front-left wheel, nearly buried in powdery soil. <img src="http://i.i.com.com/cnwk.1d/i/tim//2010/01/12/spirit3_362x272.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" />In an attempt to understand the conditions under which Spirit has become stuck, NASA team members have created a test setup that simulates the situation the rover faces in a soil patch on Mars called Troy. <img src="http://i.i.com.com/cnwk.1d/i/tim//2010/01/12/14rubal550x217_540x213.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" />This area was named "Rub al Khali" after a similarly desolate area in Saudi Arabia. <img src="http://i.i.com.com/cnwk.1d/i/tim//2010/01/12/14clovis500x500_440x330.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /> The 0.35-inch hole drilled into this rock, called Clovis, is the deepest one driven into a Martian rock. <img src="http://i.i.com.com/cnwk.1d/i/tim//2010/01/12/SolA18612F291581504EFFB0OAP1214R0M1_br_440x330_440x330.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" />Since losing the use of its right-front wheel in 2006, Spirit has been forced to move backward. Looking back after moving 22.7 meters on the 1,861st Martian day (on March 28, 2009), we can see the bright soil churned up by dragging the immobile wheel.</blockquote>

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