Astronaut propulsion unit Astronaut propulsion unit An astronaut propulsion unit (or astronaut maneuvering unit) is used to move an astronaut relative to the spaceship during a spacewalk. The first astronaut propulsion unit was the Hand-Held Maneuvering Unit (HHMU) used on Gemini 4. The Hand-Held Maneuvering Unit was the EVA "zip" gun used by Ed White on the Gemini 4 mission in 1965. The hand-held gun held several pounds of nitrogen, and allowed limited movement around the Gemini spacecraft. It was also used by astronaut Michael Collins on the Gemini 10 mission in 1966. The United States Air Force (USAF) Astronaut Maneuvering Unit (AMU)
Chinese as a foreign language further. In a Biblical vein similar to Kircher's, he tried to demonstrate that Chinese was the Primitive or Adamic language. In his "An Historical Essay Endeavoring a Probability That the Language of the Empire of China Is the Primitive Language" (1669), he suggested that Chinese was the language spoken before the confusion of tongues. Inspired by these ideas, Leibniz and Bacon, among others, dreamt of inventing a "characteristica universalis" modelled on Chinese. Thus wrote Bacon: Leibniz placed high hopes on the Chinese characters: The serious study of the language in the West began with missionaries coming to China during the