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.
Space Shuttle Launches on Final Flight. Space shuttle Atlantis, delayed almost to the last second by a computer glitch, left the launch pad here at the Kennedy Space Center, punched a hole in the clouds, and disappeared into the history books. After 135 flights in 30 years, it was the last space shuttle launch ever. And it may be the last time America launches astronauts for many years. SEE MORE: 30 Years Of Space Shuttle Missions. At the Kennedy Space Center, throngs of people applauded, cheered--and in some cases wept.