The Spirit rover landed on Mars on Jan. 4, 2004. Like its twin, Opportunity, Spirit was assigned an initial mission of only ...
When Spirit dropped through the thin Martian air and bounced to a stop inside Gusev Crater, it did more than survive a ...
Just past the halfway point of its three-month prime mission, NASA’s Mars Exploration Rover Spirit has achieved several scientific firsts, but may still have its best “Eureka!” moments in front of it.