Always in demand outside the University of Toronto, Helen presided over several Canadian astronomical and scientific organizations. As director of the (U.S.) National Science Foundation's astronomy program in 1955, Helen helped determine sites for the National Radio Astronomy Observatory and for Kitt Peak National Observatory. She also served on the board of directors of Bell Telephone Company of Canada from 1968 to 1978.
Helen received many honorary degrees and awards for her scientific and educational accomplishments. In 1950 she won the prestigious Annie jump Cannon Prize of the American Astronomical Society. She was also quite proud of receiving the Companion of the Order of Canada in 1976. An asteroid, a telescope, and an observatory are named after her.
At age 80, Helen married Dr. F. E. L. Priestly, a colleague at the University of Toronto. Up until the last days of her life, she actively encouraged young women to pursue science. Following a heart attack, Helen died on January 28, 1993, in Richmond Hill, Ontario. Friends remember her as a great scientist and a gracious person.
Hogg Helen Sawyer. "Catalogue of 1116 Variable Stars in Globular Clusters." Publications of the David Dunlap Observatory 1, no. 4 ( 1939).
_____. "One Hundred and Thirty-Two New Variable Stars in Five Globular Clusters." Publications of the Dominion Astrophysical Observatory 7, no. 5 ( 1938).
_____. "Second Catalogue of Variable Stars in Globular Clusters." Publications of the David Dunlap Observatory 2, no. 35 ( 1955).
_____. The Stars Belong to Everyone. New York: Doubleday, 1976.
_____. "Third Catalogue of Variable Stars in Globular Clusters." Publications of the David Dunlap Observatory 3, no. 6 ( 1973).
Shapley H., and H. Sawyer. "Variable Stars in Globular Clusters." Popular Astronomy 38 ( 1930): 408.
Webb Michael. Helen Sawyer Hogg: A Lifetime of Stargazing. Mississauga, Ontario: Copp Clark Pitman, 1991. [This book is part of the "Scientists and Inventors" series for children.]
Yost Edna. Women of Modern Science. New York: Dodd Mead, 1959. (Reprint: Westport, Conn.: Greenwood Press, 1984.)