Observations

Daily cosmobite: happy birthday Annie!

A 1922 portrait of Annie Jump CannonPioneering female astronomer Annie Jump Cannon was born on this day in 1863 at Dover, Delaware in the United States. Working at Harvard College Observatory she classified almost 400,000 stars by their spectra and sorted them into spectral classes in a scheme of her own devising. Astronomers today still use her classification scheme.

A 1922 portrait of Annie Jump Cannon. Courtesy Wikimedia Commons

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