One More Thing

摘要

At this moment, 12 U.S. spacecraft are exploring other planets, the moon, and various solar system objects. The age of robotic solar system exploration began on August 27,1962, with the launch of Mariner 2 to Venus. This engineering model is assembled from parts identical to those in the world's first interplanetary spacecraft, which made observations of Venus from a distance of 21,500 miles.