50-foot interferometer mount, outside Mount Wilson Observatory's office in Pasadena. Two unidentified men stand on the ground next to the interferometer mount, a third is poised above the mount adjusting a tarpaulin. A small portion of the office building is seen behind the tarpaulin at the far left. The two men on the ground are wearing coveralls and hats. 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.