ROCKET ENGINE TYPES ROCKETS & LAUNCH VEHICLES 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 inertial upper stage (IUS) A two-stage solid-rocket motor used to boost heavy satellites out of low Earth orbit into a higher orbit. It can be used in conjunction with both the Space Shuttle and Titan. Related categories    • ROCKET ENGINE TYPES    • ROCKETS, MISSILES, AND LAUNCH VEHICLES Also on this site: Encyclopedia of Alternative Energy & Sustainable Living Encyclopedia of History Transport Concepts & Designs (partner site) BACK TO TOP