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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 List of conjunctions (astronomy) ： ウィキペディア英語版 List of conjunctions (astronomy) This is a list of our solar system's recent and forthcoming planetary conjunctions (in layman's terms, "when two planets look close together"). In astronomy, a conjunction is an event, defined only when using either an equatorial or an ecliptic celestial coordinate system, in which any two astronomical objects (eg. asteroids, moons, planets, stars) have the same celestial longitude, normally as when observed from the Earth (geocentric). In the case of a geocentric conjunction of two of our solar system's planets, since our solar system's planets appear to travel "along the same line" (the ecliptic), the two planets appear to an Earthbound observer as being near one another in the sky around the time of the conjunction. The list below presents instances during the period 2005-2020 in which two of our solar system's planets are in conjunction according to the equatorial coordinate system (in which the celestial longitude is termed right ascension). ==Conjunctions of planets in right ascension 2015-2020 == 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「List of conjunctions (astronomy)」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.