Sojourner Rover

Sojourner meets up with a large rock called 'Yogi'

NASA / JPL

This is a section of a 360-degree panorama taken by Mars Pathfinder. The tracks and circular pattern in the soil leading up to Yogi were part of Sojourner's soil mechanics experiments, in which varying amounts of pressure were applied to the wheels in order to determine the soil's physical properties. Sojourner's ramp and Pathfinder's deflated airbags and lander 'petals' are visible in the foreground. The 'Twin Peaks' potrude from the horizon at left, 1-2 kilometers away.

NASA / JPL

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