A Heartfelt Goodbye to a Spirited Mars Rover

By John Callas Mars Exploration Rover Project Manager John Callas sent this letter to his team shortly after the final command was sent to the Mars rover Sprit, which operated on the surface of Mars for more than six years and made numerous scientific discoveries. Artist’s concept of NASA’s Mars Exploration Rover. Image credit: NASA/JPL-Caltech […]...

May 26, 2011 / More »