But these measurements are consistent , and with more data that difference should get smaller . The Mars rover Curiosity landed on the surface of the Red Planet in August . Hide Caption 3 of 58 Photos:NASA's Mars Curiosity Rover A planet with four suns was identified by citizen scientists . Four retired space shuttles found new homes in 2013 .
The Mars rover Curiosity landed on the surface of the Red Planet in August . Hide Caption 3 of 58 Photos:NASA's Mars Curiosity Rover A planet with four suns was identified by citizen scientists . Four retired space shuttles found new homes in 2013 .