SPACEWhatever it was doing up in space, we may never know, but the U.S. Air Force's unmanned X-37B space plane returned to Earth this week.

SPACEBBC. Scientists have worked out the reasons for the distorted shape of our Moon. A US team calculated the effect on the shape of the

SPACEThis video is a compilation of military experts speculating on the X-37B space plane.

CHINANational Geographic: "The solar-powered Jade Rabbit rover is seen here making tracks away from the lander just before it goes into hibernation for the two-week-long

SPACECNN: "NASA's Cassini spacecraft has provided your multicolored space distraction of the day: images of a swirling, six-sided weather feature on the surface of Saturn. Scientists say

CHINACNN. China launches first mission to the moon. China's first lunar rover deployed successfully from the unmanned spacecraft Chang'e-3 that landed on the moon Saturday.