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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク De systemate orbis cometici, deque admirandis coeli characteribus ： ウィキペディア英語版 De systemate orbis cometici, deque admirandis coeli characteribus ''De systemate orbis cometici, deque admirandis coeli characteribus'' (transl. ''Of the systematics of the world of comets, and on the admirable objects of the sky'') is a small tract on comets and other sky objects by the Sicilian astronomer Giovanni Battista Hodierna published in 1654.〔 〕 It contains a catalogue of comets and other sky objects, but had limited circulation and the work was forgotten until 1985.〔〔 〕 In this work, Hodierna expressed the belief that comets were made of a more terrestrial substance, and considered nebulae to be made up of stars (''Lux Primogenita'').〔〔 ==Scope== The first part of his work (''De systemate orbis cometici'') followed Galileo's ideas on comets.〔〔 The second part (''De admirandis coeli characteribus'') consisted of four main sections. The first concerns the classification of nebulaes. Hodierna classified the objects into three types according to their resolvability. ''Luminosae'', or star clusters to the naked eye, ''Nebulae'', or clusters that appeared nebulous to the naked eye, but which were resolvable in his telescope, and ''Occultae'', which did not resolve even with the aid of his telescope.〔〔 The second part is a list of 40 nebulae, of which roughly 25 have been identified as known objects, the others having too unclear a description for a modern identification.〔 The third section is an attempt at a unifying theory of celestial objects, and the fourth concerns Copernican heliocentrism.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「De systemate orbis cometici, deque admirandis coeli characteribus」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.