保护地球，探索宇宙，发现文明
Astronaut John Glenn enters the Mercury spacecraft, Friendship 7, prior to the launch of Mercury-Atlas 6 (MA-6) on Feb. 20, 1962. The MA-6 mission was the first crewed orbital flight and Glenn became the first American to orbit the Earth during the three-orbit, five-hour MA-6 mission. Image Credit: NASA 1962年2月20日，在水星阿特拉斯6号（MA-6）发射之前，宇航员约翰·格伦进入水星飞船友谊7号。MA-6任...
On February 20, 1962, NASA launched one of the most important flights in American history. The mission? Send a man to orbit Earth, observe his reactions and return him home safely. The pilot of this historic flight, John Glenn, became a national hero and a symbol of American ambition. NASA’s Multiple Axis Space Test Inertia Facility, or Gimbal Rig, was...