Leavitt's life (1 gen 1868 anni – 1 gen 1921 anni)

Descrizione:

Leavitt discovered the relationship
between the intrinsic brightness of a variable
star and the time it took to vary in brightness,
making it possible for others to estimate the
distance of those faraway stars, conclude that
additional galaxies exist, and begin mapping the
Universe.

Aggiunto al nastro di tempo:

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