Wheel slippage during attempts to extricate NASA Mars Rover Spirit from a patch of soft ground during the preceding two weeks had partially buried the wheels by the 1,899th Martian day, or sol, of the Spirit mission on Mars May 6, 2009.
Wheel slippage during attempts to extricate NASA Mars Rover Spirit from a patch of soft ground during the preceding two weeks had partially buried the wheels by the 1,899th Martian day, or sol, of the Spirit mission on Mars May 6, 2009.