Speaker Name(s): Robert E. Zee, PhD Description: The MOST (Microvariability and Oscillations of Stars) space telescope, a 53-kilogram "microsatellite" was launched from the Plesetsk Cosmodrome in Russia on June 30, 2003. Canada's first home built science satellite in over 30 years has been exceeding performance requirements for more than two years in orbit. MOST is an astronomical science mission designed to measure brightness variations as small as a few parts per million in bright nearby stars. From this information, the origins and evolution of our universe can be better understood. To construct the MOST satellite, a number of engineering innovations have been incorporated, including an attitude control system with unprecedented pointing capability for a satellite under 100 kilograms. The design of MOST will be discussed as well as software changes made after launch to improve mission performance beyond original requirements and some ground-breaking scientific data that has been collected to date.