Maria Mitchell(1818 — 1889)
Maria Mitchell
États-Unis
9 min read
America's first professional female astronomer, Maria Mitchell discovered a comet in 1847, earning her a gold medal from the King of Denmark. She was the first woman elected to the American Academy of Arts and Sciences and advocated for the scientific education of women.
Frequently asked questions
Famous Quotes
« We especially need imagination in science. It is not all mathematics, nor all logic, but it is somewhat beauty and poetry. »
« Study as if you were going to live forever; live as if you were going to die tomorrow. »
Key Facts
- 1818: born in Nantucket, Massachusetts, into a Quaker family that supported girls' education
- 1847: discovery of comet C/1847 T1, known as “Miss Mitchell’s Comet,” using a telescope
- 1848: first woman elected a member of the American Academy of Arts and Sciences
- 1865: appointed professor of astronomy at Vassar College, one of the first major women's universities
- 1889: died in Lynn, Massachusetts, leaving a lasting legacy for women in science
Works & Achievements
The first independent and official observation of a telescopic comet by a woman in the history of American science. This discovery earned her the gold medal of the King of Denmark and international renown.
Precision work carried out over nineteen years for the U.S. government: Mitchell calculated the predicted positions of Venus, data essential to the astronomical navigation of military and commercial vessels.
A series of systematic observations of the Sun's surface from the Vassar Observatory, contributing to the understanding of the solar cycle at a time when astronomical photography techniques were still in their infancy.
Among the first women to use astronomical photography in a scientific manner, Mitchell produced images of the gas giants that served in her publications and in teaching.
A scholarly article published in *Hours at Home*, analyzing the astronomical accuracy of Milton's epic poem. It reflects Mitchell's literary and scientific culture, uncommon among scholars of her time.
Mitchell was one of the founders of this organization, which advocated for women's access to intellectual and scientific professions. Her activist work extended her teaching at Vassar beyond the college walls.
Anecdotes
On the night of October 1, 1847, Maria Mitchell climbed onto the roof of the Nantucket bank where her father worked and pointed her telescope at the sky. She spotted an unfamiliar fuzzy smudge in the constellation Cassiopeia: it was a comet that no one had yet reported. Her discovery earned her the gold medal promised by the King of Denmark to the first observer of a telescopic comet.
Although she became the first woman elected to the American Academy of Arts and Sciences in 1848, Mitchell long encountered closed doors. In 1850 she was also admitted to the American Association for the Advancement of Science, yet some male colleagues refused to take her seriously, faulting her for being self-taught. She answered those critics by publishing rigorous work on sunspots and on the surfaces of Jupiter and Saturn.
When Vassar College hired her as its first astronomy professor in 1865
Mitchell insisted on a method that was radical for the time: her students had to observe the sky themselves every night
notebook in hand
rather than simply reading textbooks. She often said:
Do your calculations, then check them again. Precision is the only honesty possible in science.
Mitchell was one of the rare women scientists to work for the United States federal government: for nearly twenty years she calculated the positions of Venus for the American Nautical Almanac, an indispensable reference for maritime navigation. This painstaking work, carried out from her home, provided her with a steady income at a time when women were shut out of virtually every official scientific post.
In 1873, Mitchell co-founded the Association for the Advancement of Women and became its president in 1875. In a celebrated address, she declared that women possessed as much intellectual capacity as men for the sciences, and that society was squandering half its genius by excluding them. That conviction shaped her entire teaching career at Vassar, where she trained generations of women astronomers.
Primary Sources
I have never studied enough. I have never worked enough. I have never been free enough to concentrate fully on science, because domestic duties always claimed their share of my time.
This evening, while observing with the two-inch telescope, I found a nebulous object that did not appear on my charts. Its position and slow movement lead me to believe it is a comet.
Milton had a deep knowledge of the astronomy of his time, and his descriptions of the cosmos show a remarkable precision for a poet.
The time has come to stop asking permission to enter the sciences. Women must claim their place in laboratories and observatories as a natural right, not as a granted favor.
Mary Somerville showed that scientific greatness is not the exclusive domain of men. Her mathematical work will stand as a monument long after her detractors are forgotten.
Key Places
Maria Mitchell's birthplace, a stronghold of whalers and navigators where practical astronomy was a daily necessity. It was from the roof of the local bank that Mitchell discovered her comet in 1847.
Mitchell lived and worked here from 1865 to 1888, training generations of women astronomers. The observatory, equipped with a 12-inch refractor, was one of the best-appointed in the United States.
An observatory built in Mitchell's memory in 1908, on the site of the family home. It now houses her original instruments and carries on her legacy by hosting science programs for young people.
Mitchell collaborated with the naval observatory during her work for the Nautical Almanac Office. There she met the leading American astronomers of her day and advocated for the inclusion of women in federally funded research.
During her European journey of 1857–1858, Mitchell visited Italian observatories and met scholars who welcomed her as an equal — an experience that deepened her conviction that science transcends borders and gender.
