Hogg and Seager at RASC 2020 GA

RASC General Assembly June 5 to 7 2020 Executive Plaza Hotel Coquiltam BC

Two Canadian women astronomers are featured prominently at the Hogg Memorial Lecture that is part of the RASC 2020 General Assembly in Vancouver. The Hogg Lecture is named in recognition of the lifelong contributions of Dr. Helen Sawyer Hogg towards increasing public awareness and appreciation of the Universe. It is held annually alternating between the RASC General Assembly in even-numbered years and CASCA’s conference in odd-numbered years. Dr. Sara Seager is delivering this year’s Hogg Lecture during the RASC 2020 GA on June 6th, 7:00 pm at Simon Fraser University. The lecture is free and open to the public – register now.

Dr. Helen Sawyer Hogg

Dr. Hogg was a notable woman of science in a time when many universities would not grant scientific degrees to women. As an astronomer, she is recognized for pioneering research into globular clusters and variable stars.

Helen Sawyer Hogg at Telescope
Helen Sawyer Hogg. beside her beloved David Dunlap 74-inch telescope in Toronto

Hogg did graduate work at the Harvard Observatory where she worked with Dr. Harlow Shapley measuring the size and brightness of globular clusters and publishing several papers. Hogg received her master’s and doctoral degrees from Radcliffe College because, at that time, Harvard refused to award graduate degrees in science to women.

In 1931, she and her husband Frank set out in their Model A Ford for Victoria BC and the Dominion Astrophysical Observatory where a position awaited Frank. There was no opening at the DAO for Helen, but the Director gave her the use of the 72-inch telescope to further her research. The couple moved to Toronto’s “new” Dunlop Observatory in 1935 where Hogg continued her study of variable stars in globular clusters.

Her successful professional career was matched by her generous community activities, many of them reflecting her efforts to ensure that

“The Stars Belong to Everyone”

Helen Sawyer Hogg

which is the title of one of her popular books and adopted as the theme of the 2020 GA. She prepared a weekly astronomy column for The Toronto Star for 30 years, starred in an astronomy TV show, and wrote numerous articles for the Journal of the RASC. She was the first woman president of the physical sciences section of the Royal Society of Canada, as well as the first female president of the Royal Canadian Institute, and a national RASC president.

Helen Sawyer Hogg Plaque
Canada Museum of Science and Technology, plaque to Dr. Helen Sawyer Hogg.

Dr. Hogg was promoted to a Companion of the Order of Canada in 1976 and posthumously inducted into the Canadian Science and Engineering Hall of Fame. RASC included her among 15 eminent astronomers that were named as Honorary RASC Members.

Dr. Sara Seager

The Hogg lecture at the 2020 General Assembly will be given by Dr. Sara Seager. She is a planetary scientist and astrophysicist at the Massachusetts Institute of Technology. Dr. Seager has pioneered research in the field of exoplanet atmospheres and now, like an astronomical Indiana Jones, is on a quest seeking the field’s holy grail, another Earth-like planet, searching for life by way of exoplanet atmospheric biosignature gases.

Seager’s research has introduced many new ideas to the field of exoplanet characterization, including work that led to the first detection of an exoplanet atmosphere. She was part of a team that co-discovered the first detection of light emitted from an exoplanet and the first spectrum of an exoplanet.

The light blue region depicts the “conventional” habitable zone for planets
Image credit: Sara Seager, Science 03 May 2013: Vol. 340, Issue 6132

Seager’s research now focuses on theoretical models of atmospheres and interiors of all kinds of exoplanets as well as novel space science missions.

Her Hogg lecture on Mapping the Nearest Stars for Habitable Worlds is free and open to the public.

She is the author of two textbooks and has been recognized for her research by Popular Science, Discover Magazine, Nature, and TIME Magazine. Seager was awarded a MacArthur Fellowship in 2013.

Professor Sara Seager was born and grew up in Toronto, Canada. Among her first memories is a trip to a “star party” with her father, to see the moon through a telescope—spectacular! Professor Seager graduated from Jarvis Collegiate Institute, a 200-year old public high school known for its science education. During high school she was astounded to learn that one could be an astrophysicist for a living, only to be deterred by her father, who believed the best career was as a doctor or lawyer.

Seager graduated with a BSc in the Math and Physics Specialist Program at the University of Toronto. Like Hogg, she did graduate work at Harvard where her realization of the surprising diversity of exoplanets has led to Seager’s maxim, “For exoplanets, anything is possible under the laws of physics and chemistry.”