29
/it/
it
AIzaSyAYiBZKx7MnpbEhh9jyipgxe19OcubqV5w
April 1, 2024
Creare
Public Timelines
Biblioteca
FAQ
For education
Cabinet
For educational institutions
For teachers
For students/pupils
Scaricare
Export
Creare una copia
Integrare nel sito Web
Modificare
Visualizzazioni 363
0
0
big history project timeline
Henrietta Leavitt, and Edwin Hubble.
è stata creata
Alia
⟶ è stato aggiornato 23 gen 2018 ⟶
List of edits
Commenti
Eventi
Henrietta Leavitt Is Born
Leavitt publishes her theory on the correlation between period and luminosity in Cepheid variables
Leavitt publishes a table of 25 different Cepheid variable periods
Leavitt dies of cancer on December 12 in Cambridge, MA
Edwin Hubble is born
Hubble joins the staff of the Mount Wilson Observatory
Hubble demonstrates that there are galaxies beyond the Milky Way
Hubble using the work of Vesto Slipher, Hubble and Milton Humason identify Hubble’s Law, proving that the Universe is expanding
Hubble discovers asteroid 1373 Cincinnati
Hubble dies of a heart attack on September 28 inSan Marino, California
Periodi
Leavitt Attends Oberlin College
Leavitt attends the Society for Collegiate Instruction of Women (Radcliffe/Harvard)
Leavitt did volunteer work at Harvard College Observatory
Leavitt paid work at Harvard College Observatory; gradually loses her hearing
Leavitt discovers 2400 Cepheid variable stars and develops her period-luminosity theory
Hubble Attends Wheaton High School in Illinois
Attends University of Chicago
Hubble studies astronomy at the Yerkes Observatory; earns a doctorate from the University of Chicago
Hubble enlists in the U.S. Army, serves in World War I
Hubble helps design the Hale Telescope on Mount Palomar in California