Astronomy historian Michael Hoskin writes to Grace Hubble, sending her photocopies of letters he found in the American Astronomical Society collection regarding Edwin's discovery of cepheids in M31. He also sends her a copy of the paper he delivered at UCLA. Lastly, he describes an enjoyable visit with the Mayalls.
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.