ROCKETRY TERMINOLOGY A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z                    HOME ABOUT CATEGORIES SITE MAP COPYRIGHT ADVERTISE CONTACT entire Web this site countdown Listen to the final countdown of Apollo 11 The step-by-step process leading to a launch. It runs according to a prearranged schedule, measured in terms of T-time (T minus time before the engine start sequence begins and T plus time thereafter). T-0:00:00 is not necessarily the liftoff point, however; the Space Shuttle, for example, typically lifts off at T+0:00:03. Related category    • ROCKETRY TERMINOLOGY Also on this site: Encyclopedia of Alternative Energy & Sustainable Living Encyclopedia of History Transport Concepts & Designs (partner site) BACK TO TOP