logo

Video encyclopedia

09/05/1922 The IAU formally adopt Annie Jump Cannon's stellar classification system

1:30

Teach Astronomy - Annie Cannon

3:19

Annie Jump Cannon - Girl Hero of the Stars

10:41

Stars: Crash Course Astronomy #26

7:57

Star Classification - Sixty Symbols

46:25

#15 Annie Jump Cannon - Your Gal Friday (Full Episode)

The Harvard system is a one-dimensional classification scheme by astronomer Annie Jump Cannon, who re-ordered and simplified a prior alphabetical system. Stars are grouped according to their spectral characteristics by single letters of the alphabet, optionally with numeric subdivisions.
    Explore contextually related video stories in a new eye-catching way. Try Combster now!