Cannon was an American astronomer whose cataloging work is still in use and serves as the basis for modern theoretical understanding of stellar evolution. In 1897, she became an assistant in the Harvard College Observatory, where she later served as astronomer and curator of astronomical photographs. Recognizing that the spectra of many stars had been photographed in the second half of the 19th century, Cannon classified more than 500,000 stars. What celestial feature is named for her? Discuss