The MOST Space telescope

Launched on June 30, 2003, the MOST satellite (Micro variability and Oscillation of STars) is Canada’s first space telescope. Affectionately known as the “Humble Space Telescope”, MOST sports the smallest telescope in Earth orbit. The 6” Maksutov-Cassegrain optical system, housed in a micro-satellite bus the size of a large suitcase, was designed to conduct ultraprecise measurements of the varying brightness of stars, allowing scientists to probe the atmospheres of planets beyond our Solar System, measure the ages of stars and, in doing so, help set a limit on the age of our Universe.

Artist's conception of the MOST microsat in orbit.

The heart of MOST, the assembled telescope with optics fabricated by Ceravolo Optical Systems.

Ceravolo Optical Systems consulted on the design of the optical tube assembly, fabricated the telescope’s optics, including the “periscope” steering mirror, and assisted in assembly and testing of the telescope.

Optical layout of the MOST telescope.

The MOST's primary mirror subassembly in the clean room.

Principal investigator Dr. Jaymie Mathews, with the MOST microsat and the flight spare telescope assembly.

Dare to compare! The Hubble and the Humble.