When Professor Keeler entered upon the duties of Director of the Lick Observatory, on June 1, 1898, he planned to devote his observing time for several years to photographing the brighter nebulæ and star clusters, with the Crossley reflector. The story of his wonderful success with this difficult instrument is familiar to all readers of astronomical literature: this form of telescope was in effect born again; and his contributions to our knowledge of the nebulæ were epoch-making.
- АвторДжеймс Едвард Кілер
- ВидавництвоProject Gutenberg
- Рік видання2011 р.
- Оригінальна назваPhotographs of Nebulæ and Clusters, Made with the Crossley Reflector
- Тип книгиЕлектронна книга
