what impact did she leave on the scientific community?
"Leavitt's law" made the stars the first "standard candle" in astronomy, allowing scientists to compute the distances to galaxies too remote for stellar parallax observations to be useful.
Henrietta Swan Leavitt
The period–luminosity relationship for Cepheids, now known as "Leavitt's law" made the stars the first "standard candle" in astronomy, allowing scientists to compute the distances to galaxies too remote for stellar parallax observations to be useful.
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 when did she start her astronomical profession? After 1903
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Henrietta Swan Leavitt [SEP] Scientific impact
According to science writer Jeremy Bernstein, "variable stars had been of interest for years, but when she was studying those plates, I doubt Pickering thought she would make a significant discovery—one that would eventually change astronomy." The period–luminosity relationship for Cepheids, now known as "Leavitt's law" made the stars the first "standard candle" in astronomy, allowing scientists to compute the distances to galaxies too remote for stellar parallax observations to be useful. One year after Leavitt reported her results, Ejnar Hertzsprung determined the distance of several Cepheids in the Milky Way and that, with this calibration, the distance to any Cepheid could be accurately determined.