How did women gain rights in the USA

In 1898, women at the Harvard Observatory were being criticized for being “out of place” and not being homemakers. Women were not usually promoted above assistant level in this type of work at that time, and many were paid only 25 cents an hour to work seven hours a day, six days a week.
Among these women at the observatory is a deaf girl named Annie Cannon.
She was very good at rating stars; It began by examining the bright stars of the southern hemisphere. A new star classification system was created, which divided stars into spectral categories
O, B, A, F, G, K, M. Its scheme was based on the strength of Balmer absorption lines.
Cannon manually classified more stars during her lifetime than anyone else, a total of about 350,000. She discovered 300 variable stars, five novae, and one spectroscopic binary, creating a bibliography of about 200,000 references. She discovered her first star in 1898, although she was not able to confirm it until 1905. When she first began classifying stars, she was able to classify 1,000 stars in three years, but by 1913, she was able to work on 200 stars per hour. Canon could classify three stars per minute just by looking at their spectral patterns, and if she used a magnifying glass, she could classify stars down to the ninth magnitude, about 16 times fainter than what the human eye can see. Her work was also meticulous
Cannon published her first guide to star spectra in 1901. In 1911, she became curator of astronomical images at Harvard. In 1914, she was accepted as an honorary member of the Royal Astronomical Society. In 1921, she became one of the first women to receive an honorary doctorate from a European university when she was awarded an honorary doctorate in mathematics and astronomy from the University of Groningen.
Cannon published her first guide to star spectra in 1901. In 1911, she became curator of astronomical images at Harvard. In 1914, she was accepted as an honorary member of the Royal Astronomical Society. In 1921, she became one of the first women to receive an honorary doctorate from a European university when she was awarded an honorary doctorate in mathematics and astronomy from the University of Groningen.