Remotely controlled landers such as Viking, Pathfinder and the two Mars Exploration Rovers have landed on the surface of Mars and several Venera and Vega spacecraft have landed on the surface of Venus.
Eleven years and two months after its landing on Mars, the total driving distance of NASA's Mars Exploration Rover Opportunity surpassed the length of a marathon race: 26.219 miles(42.195 kilometers).
On July 2009 NASA and ESA signed the Mars Exploration Joint Initiative, which proposed to utilise an Atlas rocket launcher instead of a Soyuz, which significantly altered the technical and financial setting of the ExoMars mission.
This scene from NASA's Mars Exploration Rover Opportunity shows"Lunokhod 2 Crater," which lies south of"Solander Point" on the west rim of Endeavour Crater.
This image from the panoramic camera(Pancam) on NASA's Mars Exploration Rover Opportunity shows the location of a rock called"Pinnacle Island" before it appeared in front of the rover in early January 2014.
Spirit and Opportunity launched separately in the summer of 2003, kicking off the Mars Exploration Rover(MER) mission, and landed a few weeks apart in January 2004.
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