cryogenic cooling unit
61astronomy — /euh stron euh mee/, n. the science that deals with the material universe beyond the earth s atmosphere. [1175 1225; ME astronomie ( < AF) < L astronomia < Gk. See ASTRO , NOMY] * * * I Science dealing with the origin, evolution, composition,… …
62space exploration — Investigation of the universe beyond Earth s atmosphere by means of manned and unmanned spacecraft. Study of the use of rockets for spaceflight began early in the 20th century. Germany s research on rocket propulsion in the 1930s led to… …
63aerospace industry — Introduction assemblage of manufacturing concerns that deal with vehicular flight within and beyond the Earth s atmosphere. (The term aerospace is derived from the words aeronautics and spaceflight.) The aerospace industry is engaged in the …
64Timeline of STS-121 — This is the timeline for STS 121, the mission to the ISS.AboutThe shuttle was docked to the ISS for the majority of the flight. For much of the time the shuttle was at the ISS the Multi Purpose Logistics Module Leonardo was mated and accessible… …
65Air pollution — from World War II production Smog over …
66Mercury (element) — gold ← mercury → thallium Cd ↑ Hg ↓ Cn …
