[all systems go] {Originally from space English, now general colloquial usage.} […]

[chicken switch] {n.}, {slang}, {Space English} 1. The emergency eject button […]

[command module] {n.}, {Space English} 1. One of the three main […]

[countdown] {n.}. {Space English}, {informal} 1. A step-by-step process which leads […]

[launch window] {n.}, {Space English}, {informal} 1. A period of time […]

[lunar module (L.M.)] or [Lem] {n.}, {Space English} That portion of […]

[space probe] {n.}, {Space English} An unmanned spacecraft other than an […]