{"product_id":"photographs-of-nebulae-and-clusters-made-with-the-crossley-reflector-gb-36470","title":"Photographs of Nebulæ and Clusters, Made with the Crossley Reflector","description":"\u003cp\u003e\u003cb\u003ePhotographs of Nebulæ and Clusters, Made with the Crossley Reflector\u003c\/b\u003e\u003c\/p\u003e\u003cp\u003eWhen Professor Keeler entered upon the duties of Director of the Lick\r\nObservatory, on June 1, 1898, he planned to devote his observing time for\r\nseveral years to photographing the brighter nebul and star clusters, with\r\nthe Crossley reflector. The story of his wonderful success with this\r\ndifficult instrument is familiar to all readers of astronomical\r\nliterature: this form of telescope was in effect born again; and his\r\ncontributions to our knowledge of the nebul were epoch-making.\nProfessor Keelers observing programme included one hundred and four\r\nsubjects. At the time of his lamented death, on August 12, 1900,\r\nsatisfactory negatives of two-thirds of the selected objects had been\r\nsecured. The unphotographed objects were mainly those which come into\r\nobserving position in the unfavorable winter and spring months. The\r\ncompletion of the programme was entrusted to Assistant Astronomer Perrine.\r\nThe observers were assisted chiefly by Mr. H. K. Palmer, and in smaller\r\ndegree by Messrs. Joel Stebbins, C. G. Dall, R. H. Curtiss and Sebastian\r\nAlbrecht.\nProfessor Keelers photographs enabled him to make two discoveries of\r\nprime importance, not to mention several that are scarcely secondary to\r\nthem.\n\u003cb\u003e ......Buy Now (To Read More)\u003c\/b\u003e\u003c\/p\u003e\u003ch3\u003eProduct details\u003ch3\u003e\u003c\/h3\u003e\n\u003c\/h3\u003e\u003cp\u003e\u003cb\u003eEbook Number\u003c\/b\u003e: 36470 \u003cbr\u003e\u003cb\u003eAuthor\u003c\/b\u003e: Keeler, James Edward \u003cbr\u003e\u003cb\u003eRelease Date\u003c\/b\u003e: Jun 19, 2011 \u003cbr\u003e\u003cb\u003eFormat\u003c\/b\u003e: eBook \u003cbr\u003e\u003cb\u003eLanguage\u003c\/b\u003e: English \u003cbr\u003e\u003c\/p\u003e","brand":"booksdeli.com","offers":[{"title":"Keeler, James Edward,1857-1900 \/ eBook \/ English","offer_id":43220349354141,"sku":"gb-36470-ebook","price":9.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0619\/5648\/9373\/products\/36470.jpg?v=1671550185","url":"https:\/\/booksdeli.com\/products\/photographs-of-nebulae-and-clusters-made-with-the-crossley-reflector-gb-36470","provider":"booksdeli.com","version":"1.0","type":"link"}