in 1897. Spectra of Bright Stars Photographed With the 11-Inch Draper Telescope As Part of the Henry Draper Memorial and Discussed by Antonia C. Maury Under the Direction of Edward Charles Pickering (1897) presented the results of Maury's examination of 4,800 stellar photographs, using her own system of classification, and analyzed 681 bright northern stars in detail. It was the first observatory publication to have a woman's name in the title. Pickering and others at the observatory disagreed with Maury's system of classification and explanation of differing line widths, and refused to use it. It was partly in response to this negative reaction to her work that she decided to leave the observatory. However, by 1908 Danish astronomer Ejnar Hertzsprung had realized the value of her classifications and used them in his system of identifying very bright red giant stars from faint dwarf stars. Hertzsprung wrote to Pickering: Not until 1922 did the International Astronomical Union (IAU) modify its classification system based on the work done by Maury and Hertzsprung, a formulation known as the Hertzsprung–Russell diagram. Astronomer Dorrit Hoffleit has presented scientific evidence to support the view that stellar morphology was held back by 30 years as a result of the failure to adopt Antonia Maury's stellar classification theory sooner. Between 1896 and 1918 Maury taught physics and chemistry at the Castle School (Miss C.E. Mason's Suburban School for Girls) in Tarrytown, New York. She also gave lectures on astronomy at Cornell. In 1918, Maury returned to Harvard College Observatory as an adjunct professor. With Pickering's successor Harlow Shapley she was given credit for her work, which was published under her own name. She stayed in the observatory until her retirement in 1948. Her work summarizing many years of research on the spectroscopic analysis of the binary star Beta Lyrae was published in 1933. Awards Antonia Maury was a member of the American Astronomical Society and the Royal Astronomical Society. In 1943, she was awarded the Annie Jump Cannon Award in Astronomy by the American Astronomical Society. The lunar crater Maury and a number of smaller ejecta craters are co-named for Antonia Maury. They were originally named for her cousin, Commander Matthew Fontaine Maury, United States and later Confederate navies, and are, perhaps, the only lunar features shared by two cousins. In 1978, the Revised MK Spectral Atlas for Stars Earlier Than the Sun honored "Antonia C. Maury, Master