The Observatoire du Mont-Mégantic, IREX and l’Université de Montréal mourn the loss of René Racine

René Racine spent his life lifting our eyes to the heavens and, in doing so, lifted an entire generation of Canadian astronomy. Born in Québec City on 16 October 1939, Professor Racine’s career was defined by curiosity, craftsmanship, and a rare combination of practical engineering skill and conceptual boldness that made him a pillar of our astronomical community.

René arrived in astronomy through quiet, steady apprenticeship. After earning a degree in physics from Université Laval (1963), he pursued doctoral studies in astronomy at the University of Toronto under the supervision of Sidney van den Bergh (1929–), another giant of Canadian astronomy. René later became a Carnegie Fellow at the Mount Wilson and Palomar Observatories in California, returning to a professorship in the Department of Astronomy in the University of Toronto in 1969, where he served until 1976.

René accepted a professorship at l’Université de Montréal in 1976, where he also took on the leadership of the construction project for the Observatoire du Mont-Mégantic (OMM). From his early years abroad, René returned with a firm conviction that world-class science could, and should, be done here at home. That belief remains an essential part of his legacy. René was instrumental in creating and guiding the OMM, serving as director through its crucial formative decades. From selecting the site to assembling the academic and technical teams, René oversaw the observatory’s development, helping to build its instruments and reputation, and mentoring countless students and staff who came to regard the mountain as a second home. The OMM was
inaugurated in May 1978. The observatory we cherish today still bears the imprint of his leadership.

René later served as director of the Canada–France–Hawaii Telescope (1980–1984), where he played a pivotal role in establishing its international reputation atop Mauna Kea. His global influence was particularly telling in his championship of the virtues of the CFHT and its superb observing site on the summit of Mauna Kea. Thanks to his visionary leadership, the telescope became renowned for the unmatched quality of its imaging capabilities, a legacy that helped not just in the production of cutting-edge science results, but also in its influence on subsequent instrumental design and application at major international observatories. Following his return to Québec, he served with distinction as the Director of OMM from 1984 to 1997. His contributions in both institutions were outstanding.

René’s many scientific contributions were matched by technical ingenuity. He earned international recognition for his work on astronomical instruments and image quality, research that improved the clarity of what we could see and sharpened the questions we could ask of the universe. Those who worked with him remember a man who could move between the control room, the drafting table, and the lecture hall with equal confidence and apparently boundless energy.

On the scientific side, René made important contributions to the study of globular clusters, the development of adaptative optics, pioneering theoretical work in high-contrast imaging, and helped recalibrate the Hubble constant, a central parameter in our attempts to measure the scale and age of the universe. His research, and the collaborations it inspired, helped refine our cosmic distances and advance broader conversations in cosmology as well as the field of exoplanet imaging.

In 1997, René retired from his positions as Adjunct Full Professor and Director of the OMM and became Professor Emeritus at the University of Montréal. In 2005, he was appointed to the Executive Directorship of the Association of Canadian Universities for Research in Astronomy (ACURA), a role in which he served with distinction until 2012.

His contributions and service were recognized in many ways: membership in the Royal Society of Canada (1989) and the Order of Canada (1999), honours from Canadian astronomical societies, and distinction from the Ordre National du Québec (2005). An asteroid — 45580 Renéracine — is named in his honour, a fitting celestial tribute to a life spent in astronomy.

Beyond titles and awards, René’s true gift was what he gave to people. Students remember his patience and clarity; colleagues recall his insistence on rigour tempered by humour; collaborators valued a partner who expected excellence but shared credit freely. The observatory community, and Canadian astronomy more broadly, benefited not only from his mind, but from his readiness to teach, to build, and to protect the institutions that make discovery possible.

The light he helped focus, literally and metaphorically, will continue to pass through the telescopes and the minds he shaped. Let us remember René Racine as a builder of places and shaper of people: an astronomer who believed that great science required doing things well, and that doing things well required generosity of time and spirit.

In the quiet of a telescope dome, or in the instant when a distant point of light sharpens into a star, a part of René lives on. We mourn his passing, and we give thanks for a life that made it easier for all of us to look up.

With respect and sympathy.
Stéphane Courteau
René Doyon
David Hanes