Aug 27, 2017
In 1925, the astronomer Henry Norris Russell read a paper at the 33rd meeting of the American Astronomical Society. The paper, written by Edwin Hubble, a staff astronomer at the Mt. Wilson observatory, detailed observations of Cepheid variable stars in the Andromeda Nebula. These observations and the analysis of...
Aug 21, 2017
On April 26th of 1920, Harlow Shapley and Heber Curtis presented talks on the idea of island universes to the National Academy of Sciences. Held at the Smithsonian Museum of Natural History, the Great Debate, as it would come to be known, would showcase two differing views of the scale and structure of the universe.
Aug 6, 2017
In 1914, Harlow Shapley moved to work at the Mt. Wilson Observatory. Over the course of five years, using the 60 inch reflector there, he observed the 75 visible globular clusters and developed a whole new model of the Milky Way Galaxy and our place in it.