Explanation: Humanity's understanding of the relative brightness and variability of stars was revolutionized by the work of Henrietta Swan Leavitt (1868-1921). Working at Harvard College Observatory, Leavitt precisely calibrated the photographic magnitudes of 47 stars to which all other stars could be compared. Leavitt discovered and cataloged over 1500 variable stars in the nearby Magellanic Clouds. From this catalog, Leavitt discovered that brighter Cepheid variable stars take longer to vary, a fact used today to calibrate the distance scale of our universe.

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Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (USRA)
NASA Web Site Statements, Warnings, and Disclaimers
NASA Official: Jay Norris. Specific rights apply.
A service of: LHEA at NASA / GSFC
& Michigan Tech. U.

Publikacii s klyuchevymi slovami: famous astronomers - personalii - Peremennye zvezdy - Cefeidy - zavisimost' period-svetimost' Publikacii so slovami: famous astronomers - personalii - Peremennye zvezdy - Cefeidy - zavisimost' period-svetimost'
Sm. takzhe: K 100-letiyu E.B. Kostyakovoi «Kak bezzakonnaya kometa…» Svetovye eho ot V838 Edinoroga Ushel iz zhizni Shiv'ev Valerii Ivanovich, pedagog, mnogoletnii avtor Astroneta Ushel iz zhizni Boris Grigor'evich Pshenichner RS Kormy Risunki I.S. Shklovskogo Vse publikacii na tu zhe temu >>