when did she start her astronomical profession?
After 1903
Henrietta Swan Leavitt
Leavitt returned to the Harvard College Observatory from her travels in 1903.
do all stars spend the same amount of time on the main sequence The total life span can be estimated, to first approximation, as the total energy produced divided by the star's luminosity. what is main sequence? Continuous and distinctive band of stars that appears on plots of stellar color versus brightness. describe a few of its properties? Majority of stars on a typical HR diagram lie along the main-sequence curve and temperature of a star determines its spectral type mention a few variations in luminosity color? Cepheid variables, Delta Scuti variables, and Beta Cephei variables what is the first variation? A type of star that pulsates radially, varying in both diameter and temperature name a few stars from such variation? UNANSWERABLE what is the anomalous in this variation? A group of pulsating stars on the instability strip have periods of less than 2 days, but with higher luminosities. state the pulsation model in this variation? Pulsation of Cepheids is called the Eddington valve, or "κ-mechanism", where κ (kappa) is the usual symbol for the gas opacity. who proposed such a model? UNANSWERABLE who discovered such a variation of stars? Henrietta Swan Leavitt who is the person? An American astronomer. is the person male or female? Female did she serve in the air force? No
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Henrietta Swan Leavitt [SEP] Astronomical career
Leavitt returned to the Harvard College Observatory from her travels in 1903. Because Leavitt had independent means, Pickering initially did not have to pay her. Later, she received $0.30 an hour for her work, being paid only $10.50 per week. She was reportedly "hard-working, serious-minded …, little given to frivolous pursuits and selflessly devoted to her family, her church, and her career". One of the women that Leavitt worked with in the Harvard Observatory was Annie Jump Cannon, who shared the experience of being deaf. Pickering assigned Leavitt to the study of variable stars of the Small and Large Magellanic Clouds, as recorded on photographic plates taken with the Bruce Astrograph of the Boyden Station of the Harvard Observatory in Arequipa, Peru.