Task: Text Categorization
Input (English): In September 2013, one probe to this celestial body became the first deep space mission launched from the Mid-Atlantic Regional Spaceport. A Chinese probe to this body is scheduled for launch in December 2013. The Ranger and Surveyor spacecrafts were the first American ones to explore its surface, and the 1994 Clementine mission imaged this body from orbit. Google sponsors a private competition to land a rover on this body through the X Prize Foundation. A Soviet probe took the first pictures of the "far side" of this body, which is currently being mapped by the LRO. Lor 10 points, name the only extraterrestrial body that has been visited by human explorers.
Output (English): Science