(Left to right): Charles St. John, Ferdinand Ellerman, Albert Einstein, Walther Mayer, and Edwin Hubble on the steps outside the 150-foot tower telescope, Mount Wilson Observatory. The manuscript title at the top of the photograph reads "On Mt. Wilson at 150' Solar Tower". Each person in the photograph is identified in red ink. All of the men are wearing suits. Image courtesy of the Observatories of the Carnegie Institution for Science Collection at the Huntington Library, San Marino, California.
If you're wondering about permissions and what you can do with this item, a good starting point is the "rights information" on this page. See our terms of use for more tips.
Share your story
Has Calisphere helped you advance your research, complete a project, or find something meaningful? We'd love to hear about it; please send us a message.
