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Timeline of Solar System astronomy ==Antiquity== * 2nd millennium BC – earliest possible date for the composition of the Babylonian Venus tablet of Ammisaduqa, a 7th-century BC copy of a list of observations of the motions of the planet Venus, and the oldest planetary table currently known. * 2nd millennium BC – Babylonian astronomers identify the inner planets Mercury and Venus and the outer planets Mars, Jupiter and Saturn, which would remain the only known planets until the invention of the telescope in early modern times. * 2nd millennium BC – Chinese astronomers record a solar eclipse * 2nd millennium BC – Chinese determine that Jupiter needs 12 years to complete one revolution of its orbit. * 11th century BC – The idea of a heliocentric solar system, with the Sun at the center, is possibly first suggested in the Vedic literature of ancient India, which often refer to the Sun as the "centre of spheres". *c. 1400 BC – Chinese record the regularity of solar and lunar eclipses and the earliest known Solar prominence *c. 1100 BC – Chinese first determine the spring equinox. *776 BC – Chinese make the earliest reliable record of a solar eclipse. * 7th century BC – Egyptian astronomers alleged to have predicted a solar eclipse *613 BC, July – A Comet, possibly Comet Halley, is recorded in Spring and Autumn Annals by the Chinese * 586 BC – Thales of Miletus alleged to have predicted a solar eclipse * 350 BC – Aristotle argues for a spherical Earth using lunar eclipses and other observations * 280 BC – Aristarchus of Samos offers the first definite discussion of the possibility of a heliocentric cosmos, and uses the size of the Earth's shadow on the Moon to estimate that the Moon's radius is one-third that of the Earth, and to estimate sizes and distances for the Moon and Sun * 200 BC – Eratosthenes uses shadows to determine that the radius of the Earth is roughly 6,400 km * 150 BC – Hipparchus uses parallax to determine that the distance to the Moon is roughly 380,000 km * 134 BC – Hipparchus discovers the precession of the equinoxes *28 BC – Chinese history book Book of Han makes earliest known dated record of sunspot. *c. 150 CE – Claudius Ptolemy completes his Almagest that codifies the astronomical knowledge of his time and cements the geocentric model in the West 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「Timeline of Solar System astronomy」の詳細全文を読む スポンサード リンク
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