Palmer was born to a farming family in
Branford, Connecticut on August 29, 1862, and completed a bachelor's degree at
Vassar College in 1887. At Yale, she took two classes in astronomy with
Maria Mitchell, although her graduation address concerned Greek tragedy. After graduating, she worked as an assistant to Mitchell and as a Latin instructor at Vassar for two years. In 1889 she was hired by the
Yale University Observatory, and in 1892 she was admitted to graduate study at
Yale University. Her 1894 doctorate was from the mathematics department at Yale, but its subject was astronomy, as it concerned the calculation of the orbit of a comet
C/1847 T1 discovered in 1847 by Maria Mitchell. Palmer's thesis noted that the comets she chose to study were chosen partially because they had been discovered by women. She was one of the first seven women to earn a doctorate at Yale. It has been suggested that she was "the first woman ever to earn a doctorate" in astronomy, although fellow astronomer
Dorothea Klumpke earned a Doctor of Science degree from the
University of Paris in 1893. It would be over 30 years before another woman,
Cecilia Payne-Gaposchkin, became the first doctorate in astronomy at
Radcliffe College. During this period, Palmer also determined the orbits of three other comets, and collected a large set of observations of the
moons of Jupiter. However, she was unable to complete the extensive calculation of the orbits of the moons because of a "long and serious illness". ==Later career==