Helen Sawyer Hogg
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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
Dr. Helen Sawyer Hogg, at a table in her office, studies a photographic slide taken of one of her favourite variable stars.
Lowell High School, where Helen graduated at 15 years old
Dominion Astrophysical Observatory c. 1900–1925
David Dunlap Observatory, 1935
Globular cluster
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A globular cluster is a spheroidal conglomeration of stars that is bound together by gravity, with a higher concentration of stars towards its center. It can contain anywhere from tens of thousands to
Helen Sawyer Hogg
…Helen Battles Sawyer Hogg (August 1, 1905 – January 28, 1993) 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…
Messier 2
NGC 7006 is a highly concentrated, Class I globular cluster.
The Messier 80 globular cluster in the constellation Scorpius is located about 30,000 light-years from the Sun and contains hundreds of thousands of stars.
NGC 2808 contains three distinct generations of stars. NASA image