In 1920, astronomers Harlow Shapley and Heber Curtis held a Great Debate. Shapley argued that the spiral nebulae were small and in the Milky Way, while Curtis took a more radical position that they ...

In fact, Hale had already started building his next even bigger telescope before the 60-inch was in operation. Efforts to ...

At the of age 30, he arrived at Mount Wilson Observatory in Southern California just in time to use the new Hooker 100-inch telescope, at the time the largest in the world. He began taking ...

Enter Edwin Hubble. Hubble and the Hooker 100-inch Telescope Hubble arrived at Mount Wilson in the fall of 1919, just as the Hooker 100-inch telescope was coming online. His timing couldn't have ...

A Schmidt-Cassegrain 8-inch telescope. SBO possesses two 8-inch diameter Schmidt-Cassegrain telescopes. One is a Celestron (on long-term loan from John Bally) that was mounted piggyback on the 18-inch ...

The 18-inch telescope was erected on the open Observing Deck of the newly-built Fleischmann Addition of SBO in 1982. This telescope was the first commercial telescope ever built and sold by the ...

At the of age 30, he arrived at Mount Wilson Observatory in Southern California just in time to use the new Hooker 100-inch telescope, at the time the largest in the world. He began taking ...