Helen Sawyer Hogg, American-Canadian astronomer and academic (died 1993)

Helen Battles Sawyer Hogg was an American-Canadian astronomer who pioneered research into globular clusters and variable stars. She was the first female president of several astronomical organizations and a scientist when many universities would not award scientific degrees to women. Her dedication to sharing astronomy with the wider public lead to scientific advocacy and journalism including columns in the Toronto Star and the Journal of the Royal Astronomical Society of Canada. She was considered a "great scientist and a gracious person" over a career of sixty years.

August 1 is the 213th day of the year in the Gregorian calendar; 152 days remain until the end of the year.