Sarah Gallagher

Sarah Connoran Gallagher is an American-Canadian astronomer. She is a professor of astronomy at the University of Western Ontario, where she is the Director of the Western Institute for Earth & Space Exploration . Her research focuses on active galaxies, black holes and compact galaxy groups. From 2018 to 2022, she also served as Science Advisor to the Canadian Space Agency. From 2023 to 2025 she served as the President of the Canadian Astronomical Society (CASCA).

Education Gallagher obtained her undergraduate degree in physics from Yale University in 1995, followed by a PhD in astronomy and astrophysics from the Pennsylvania State University in 2002. For her PhD research she worked with Niel Brandt on X-ray observations of quasar absorption lines.

Career Prior to her graduate studies, Gallager was a high-school physics teacher and soccer coach at the Holderness School. From 2003 to 2006, she was a NASA Spitzer Fellow at UCLA, and then from 2006 to 2008 was an assistant research astronomer at UCLA. In 2008 she became an assistant professor at the University of Western Ontario, and was promoted to associate professor in 2014. Her responsibilities include advising the CSA President on science priorities for the Canadian Space Program, representing and promoting the Canadian space science portfolio to other government departments and internationally, communicating the societal impact and breadth of CSA's science investments, and recommending opportunities for the recruitment of young professionals in space science, engineering and other parts of STEM.

Research Gallagher uses observations from the radio through the X-ray to study quasars and compact galaxy groups, 2003 NASA Spitzer Fellowship