Microvariability and Oscillations of Stars (MOST) is a Canadian microsatellite designed to monitor optical variability in a few stellar targets for up to 60 days; it was launched in 2003. As the first telescope dedicated to asteroseismology, it was a pathfinder for the subsequent COROT and Kepler missions and is still in operation. The CSA ceased operations support in 2014.
The device measured the oscillation in light intensity of stars in order to determine their composition and age. It also measured transits of known exoplanets.
The data are also published by the Canadian Astronomy Data Center (CADC) (http://www.cadc-ccda.hia-iha.nrc-cnrc.gc.ca/en/).