Mars Polar Lander/Deep Space 2
Mars Polar Lander
Launch: January 3, 1999
Deep Space 2
Mass: 3,572 grams (7.9 pounds)
Science instruments: Sample collection/water detection experiment, soil thermal experiment, atmospheric descent accelerometer, impact accelerometer
Mars Polar Lander was an ambitious mission to set a spacecraft down on the frigid terrain near the edge of Mars' south polar cap and dig for water ice with a robotic arm. Piggybacking on the lander were two small probes called Deep Space 2 designed to impact the Martian surface to test new technologies.
Mars Polar Lander and Deep Space 2 were lost at arrival December 3, 1999.