In 1847, Maria Mitchell discovered a comet, launching her career as an astronomer. In 1865, she became professor of astronomy and director of the college observatory at Vassar, where she taught for 23 years. She was the first woman elected to the American Academy of Arts and Science and, in 1873, she founded the Association for the Advancement of Women. http://www.cr.nps.gov/nr/travel/pwwmh/ma74.htm
	Henrietta Swan Leavitt devised a method to measure the distances of stars from the Earth with stars in other galaxies. This was of great importance in the measurement of astronomical distances. Her photographic measurements were accepted among astronomers of the world, and it was known as the Harvard Standard. She later discovered 1,777 variable stars in the Magellanic Clouds which are small galaxies next to the Milky Way. She earned a B.A. from Radcliffe College in 1892, and worked at the Harvard Observatory. http://www.physics.ucla.edu/~cwp/nblimages/leavitb1.1.gif http://cannon.sfsu.edu/~gmarcy/cswa/history/leavitt.html
	In 1897, Annie Jump Cannon, with a degree in physics from Wellesley College, joined the staff at the Harvard College Observatory where she worked for over 40 years. Jump Cannon named and catalogued over 300,000 stars, perfected the universal system of stellar classification and compiled the largest accumulation of astronomical information ever assembled by a single individual. http://www.sdsc.edu/ScienceWomen/cannon.html http://www.greatwomen.org/cannon.gif http://cannon.sfsu.edu/~gmarcy/cswa/history/cannon.html
	September 26, 1910, Bessica Raiche made a solo flight using an aircraft she and her husband François built. The Aeronautical Society of America identified her as the First Woman Aviator in the United States. She went on to earn a degree and practice medicine. http://www.lihistory.com/specpio/air2.htm
	In 1911, eight years after Orville Wright's first successful flight, Harriet Quimby became the first American woman to earn a pilot's license. A year later, she became the first woman to fly across the English Channel. She was very popular, and a newspaper described her flight clothes as, "Miss Harriet Quimby's plum-colored satin costume... has a blouse and knickerbockers with a monk hood attached. The knickerbockers have inside seams closed by rows of buttons which when unfastened convert the knickers into a walking skirt... Miss Quimby wears high top leather boots." http://www.harrietquimby.org/html/bio.html
	August 13, 1911, Mathilde Moisant followed the family tradition by receiving her pilot's license and joining the Moisant International Aviators.
	In 1914, Georgia "Tiny" Broadwick became the first female parachute jumper.
	In 1923, Marion Hart was the first woman to graduate with a chemical engineering degree from MIT. Later she earned a graduate degree in geology. In 1946, at the age of 54, she learned to fly. In 1954, the life-long pioneer flew her light plane across the Atlantic Ocean.
	In 1913, Katherine Stinson established a flying business with her mother. In 1915, she became the first woman to fly loop-to-loop.

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