翻訳と辞書 Words near each other ・ Earth Watchers Center ・ Earth Water ・ Earth X ・ Earth's Answer ・ Earth's Birthday Project ・ Earth's Children ・ Earth's Creation ・ Earth's critical zone ・ Earth's energy budget ・ Earth's field NMR ・ Earth's internal heat budget ・ Earth's Last Citadel ・ Earth's location in the Universe ・ Earth's magnetic field ・ Earth's Man ・ Earth's orbit ・ Earth's Own Food Company ・ Earth's Quality ・ Earth's Rightful Ruler ・ Earth's rotation ・ Earth's shadow ・ Earth's Skin ・ Earth, Air, Fire, and Water ・ Earth, Moon, and Planets ・ Earth, Planets and Space ・ Earth, Sky, and Everything in Between ・ Earth, Sun, Moon ・ Earth, Texas ・ Earth, Wind & Fire ・ Earth, Wind & Fire (album) Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Earth's orbit ： ウィキペディア英語版 Earth's orbit Earth's orbit is the path in which the Earth travels around the Sun. Earth lies at an average distance of 149.60 million kilometers (92.957 million miles) from the Sun and a complete orbit occurs every  days (1 sidereal year), during which time Earth travels 940 million kilometers (584 million miles).〔Jean Meeus, ''Astronomical Algorithms'' (Richmond, VA: Willmann-Bell, 1998) 238. The formula by Ramanujan is accurate enough.〕 Earth's orbit has an eccentricity of 0.0167. Earth's orbital motion gives an apparent movement of the Sun with respect to other stars at a rate of about 1° per day (or a Sun or Moon diameter every 12 hours) eastward as seen from Earth.〔Our planet takes about 365 days to orbit the Sun. A full orbit has 360 degrees. That demonstrates that each day, the Earth travels roughly 1 degree in its orbit. As a consequence, the Sun will appear to move across the sky relative to the stars by that same amount.〕 Earth's orbital speed averages about 30 km/s (67,000 mph), which is fast enough to cover the planet's diameter in seven minutes and the distance to the Moon in four hours. Viewed from a vantage point above the north poles of both the Sun and the Earth, the Earth would appear to revolve in a counterclockwise direction about the Sun. From the same vantage point, both the Earth and the Sun would appear to rotate in a counterclockwise direction about their respective axes. ==History of study== (詳細はSolar System and put the planets, including Earth, in its orbit. Historically, heliocentrism is opposed to geocentrism, which placed the Earth at the center. In the 16th century, Nicolaus Copernicus' ''De revolutionibus'' presented a full discussion of a heliocentric model of the universe in much the same way as Ptolemy had presented his geocentric model in the 2nd century. This 'Copernican revolution' resolved the issue of planetary retrograde motion by arguing that such motion was only perceived and apparent. "Although Copernicus's groundbreaking book...had been () over a century earlier, (Dutch mapmaker ) Joan Blaeu was the first mapmaker to incorporate his revolutionary heliocentric theory into a map of the world."〔Jerry Brotton, ''A History of the World in Twelve Maps'', London: Allen Lane, 2012, p. 262.〕 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「Earth's orbit」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.