The American astronomer Annie Jump Cannon (1863-1941) made her most outstanding contribution to modern astronomy in the field of stellar spectral classification. Annie Jump Cannon was born in Dover, Delaware, on December 11, 1863, the daughter of...

Annie Jump Cannon was born in Dover, Delaware, in 1863. Her mother had been very interested in astronomy from her own childhood days, and that interest was infectious. Together, mother and daughter studied the sky from the attic of their house, where...

1863-1941 American Astronomer Annie Jump Cannon was the first astronomer to develop a simple spectral classification system. She classified 400,000 stars—more than anyone else had achieved previously—and discovered 300 variable stars,...

American astronomer Annie Jump Cannon developed a stellar classification system that is considered by many astronomers to be the foundation of stellar spectroscopy. The science of stellar spectroscopy analyzes the photographic spectrum of a star. The...

Annie Jump Cannon (December 11, 1863 – April 13, 1941) was an American astronomer whose cataloging work was instrumental in the development of contemporary stellar classification. With Edward C. Pickering, she is credited with the creation of the...

The sudden end of the short and shaky tenure of Defense Secretary Les Aspin highlights the difficulty of forging national security policy in these confusing times. It also presents the Clinton administration with a chance to make a fresh start. Aspin's resignation Wednesday...

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