| | NASA - Space Shuttle and International Space Station |
 | | A launch window is the precise period of time, ranging from minutes to hours, within which a launch must occur for a rocket or Space Shuttle to be positioned in the proper orbit. |
 | | The Space Shuttle's large External Tank is loaded with more than 500,000 gallons of super-cold liquid oxygen and liquid hydrogen, which are mixed and burned together to form the fuel for the orbiter's three main rocket engines. |
 | | The Space Shuttle Enterprise, which was not designed to fly in space, made a series of appearances at air shows in the United States, Europe and Canada before being turned over to the Air and Space Museum. |
| www.nasa.gov /centers/kennedy/about/information/shuttle_faq.html (2574 words) |