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2000 in science : ウィキペディア英語版 | 2000 in science
The year 2000 in science and technology involved some significant events. ==Astronomy and space exploration==
* May 4 – A rare astronomical conjunction occurs on the New Moon including all seven of the traditional celestial bodies known from ancient times until the discovery of Uranus in 1781; this conjunction consists of the Sun and Moon, Mercury, Venus, Mars, Jupiter and Saturn. * August 10 – Publication of the M-sigma relation in ''The Astrophysical Journal''.
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