Francis Pease at telescope, Mount Wilson Observatory, 1925
Numéro d’image : 14077850
| Francis Pease at the cassegrain focus of the 100-inch telescope, Mount Wilson Observatory, 1925. The telescope's tube is vertical. Francis Pease (1881-1938) was an American astronomer. In 1908 he became an astronomer and instrument maker at the Mount Wilson Observatory. Among his designs was the 100-inch (2, 500 mm) telescope at that observatory, and a 50-foot (15 m) interferometer that he used to measure star diameters. He would later be involved in the design of the 200-inch (5, 100 mm) Hale Telescope at the Mount Palomar Observatory. In 1928 he made the first discovery of a planetary nebula within a globular cluster, later called Pease 1. The crater Pease on the Moon is named after him. | |
| Licence : | Droits gérés |
| Crédit: | Science Photo Library / Science Source |
| Taille de l’image : | 4557 px × 5666 px |
| Model Release : | Non requis |
| Property Release : | Non requis |
| Restrictions : | - |
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