heptane. n. 1. (Elements & Compounds) an alkane existing in nine isomeric forms, esp the isomer with a straight chain of carbon atoms (n-heptane), which is found in petroleum and used as an anaesthetic. Formula: C7H16. [C19: from hepta- + -ane, so called because it has seven carbon atoms].
technically it's not any of those three... After the Apollo program in the late 1960's ended, the president of the United States, Richard Nixon declared in 1973 that the USA would build the Space Shuttle to continue space exploration in low earth orbit.
Mission STS-121, NASA's second return to flight test mission is soon to lift off from NASA's Kennedy Space Center in Florida. How is the launch time determined and how long will it take the Space Shuttle to reach the International Space Station? NASA Launch Director Mike Leinbach has been working closely with orbiter Discovery and her crew. Mike, thanks for taking time out of your busy day to share your insight about launching a space shuttle into space.