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Mary Watson Whitney

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Mary Watson Whitney was a prominent American astronomer. She dedicated much of her life to studying the heavens.

Mitchell Maria telescope
Mitchell Maria telescope

Whitney is best known for her leadership at the Vassar College Observatory. She served as the director of the observatory for many years. During her tenure, she guided the publication of 102 scientific papers. Her work helped expand our understanding of the universe. She also worked to create more opportunities for women in science.

Whitney focused her research on several specific celestial objects. She studied double stars, which are two stars that appear close together. She also investigated variable stars, which change in brightness over time. Her research included asteroids and comets as well. To conduct these studies, she used photographic plates. These plates allowed astronomers to capture and measure images of space. She also studied celestial mechanics, which is the study of how objects move in space.

Mitchell Maria telescope
Mitchell Maria telescope

Her education provided a strong foundation for her scientific career. She was born on September 11, 1847, in Waltham, Massachusetts. Her father, Samuel Buttrick Whitney, was a successful real estate businessman. His wealth allowed her to receive a high-quality education. Mary excelled in mathematics during her early schooling. She graduated from public high school in 1863. She then entered Vassar College in 1865. At Vassar, she met the famous astronomer Maria Mitchell.

Mitchell Maria telescope
Mitchell Maria telescope

Whitney continued her advanced studies through several different institutions. She earned her degree from Vassar College in 1868. From 1869 to 1870, she studied quaternions and celestial mechanics at Harvard University. Because women were not permitted as students at Harvard then, she attended as a guest. During this time, she also volunteered at the Harvard College Observatory. In 1872, she earned a master's degree from Vassar. She then spent three years in Zürich, Switzerland. There, she focused on mathematics and celestial mechanics.

Mitchell Maria telescope
Mitchell Maria telescope

Her professional career at Vassar College was marked by long-term leadership. She worked as a teacher at Waltham High School from 1876 to 1881. After that, she became an assistant to Maria Mitchell at Vassar. When Mitchell retired in 1888, Whitney became a professor. She also became the director of the observatory. In 1889, she moved her mother and sister into the observatory. She did this so she could care for them while working part-time. After they passed away two years later, she returned to full-time work.

Mitchell Maria telescope
Mitchell Maria telescope

Whitney was a strong advocate for women entering scientific fields. She believed science offered excellent career opportunities. She hoped women would enter fields like practical chemistry, architecture, dentistry, and agriculture. She thought these jobs were lucrative and well-suited to women. She also believed scientific training would help women in traditional roles. In 1908, she helped fund a female research fellow at the Maria Mitchell Observatory.

Mitchell Maria telescope
Mitchell Maria telescope

In her will, she left $5,000 to Vassar College to support research by women.

Her contributions earned her several prestigious roles and memberships. She was a fellow of the American Association for the Advancement of Science. She was also a charter member of the Astronomical and Astrophysical Society. In 1902, she became the first president of the Maria Mitchell Association in Nantucket, Massachusetts. She retired from her position at Vassar in 1915 due to health reasons. Whitney died in Waltham on January 20, 1921, from pneumonia. In 1923, a bronze bas-relief portrait was unveiled at the Vassar College Observatory to honor her legacy.

Mitchell Maria telescope
Mitchell Maria telescope
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