Annie Jump Cannon


Related Overviews

Edward Charles Pickering (1846—1919)

Williamina Fleming (1857—1911)


More Like This

Show all results sharing this subject:

  • Astronomy and Astrophysics


Quick Reference


Americanastronomer. In 1896 she began work under E. C. Pickering at the Harvard College Observatory, where she undertook the classification of stellar spectra. She refined W. P. Fleming's alphabetical sequence (A, B, C, etc.), dropping some categories and rearranging to yield a continuous series of spectral types: from hot O and B stars, through A, F, and G, to cool K and M stars. Cannon's classifications of the spectra of over 225 000 stars were published in the Henry Draper Catalogue.

Subjects: Astronomy and Astrophysics.

Reference entries