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Whose star catalog helped map the structure of the Milky Way with variable stars?
Quick Answer
Henrietta Leavitt’s. Her Cepheid period-luminosity relation became a distance tool for mapping galaxies.
The Full Story
Henrietta Swan Leavitt worked at Harvard College Observatory and studied Cepheid variable stars. In 1908 and 1912 she discovered that brighter Cepheids have longer periods, a relation now called the period-luminosity law. That result gave astronomers a powerful way to measure cosmic distances. It later enabled Edwin Hubble to prove that Andromeda lies far beyond the Milky Way.
Key Facts
1.Published key work in 1908 and 1912
2.Cepheids became standard candles
3.Critical for extragalactic distance measurement
YouTube Angle
Suggested video title for this topic:
"The overlooked star researcher who gave us the cosmic yardstick"
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