Interior view of the light shaft, or pit, for the 30-foot spectrograph in 60-foot tower telescope, Mount Wilson Observatory. The bottom of the shaft is visible in the center, with a ladder visible on the right-hand side. On the left-hand side is the spectrograph support tower. 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.