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| symbolism = the Bull〔 | RA = 4.9〔 | dec = 19〔 | family = Zodiac | quadrant = NQ1 | areatotal = 797 | arearank = 17th | numbermainstars = 19 | numberbfstars = 132 | numberstarsplanets = 9 candidates | numberbrightstars = 4 | numbernearbystars = 1 | brighteststarname = Aldebaran (α Tau) | starmagnitude = 0.85 | neareststarname = Gliese 176 | stardistancely = 30.72 | stardistancepc = 9.42 | numbermessierobjects = 2 | meteorshowers = | bordering = | latmax = 90 | latmin = 65 | month = January | notes = }} Taurus (Latin for "the Bull"; symbol: 14px, Unicode: (unicode:♉)) is one of the constellations of the zodiac, which means it is crossed by the plane of the ecliptic. Taurus is a large and prominent constellation in the northern hemisphere's winter sky. It is one of the oldest constellations, dating back to at least the Early Bronze Age when it marked the location of the Sun during the spring equinox. Its importance to the agricultural calendar influenced various bull figures in the mythologies of Ancient Sumer, Akkad, Assyria, Babylon, Egypt, Greece, and Rome. There are a number of features of interest to astronomers. Taurus hosts two of the nearest open clusters to Earth, the Pleiades and the Hyades, both of which are visible to the naked eye. At first magnitude, the red giant Aldebaran is the brightest star in the constellation. In the northwest part of Taurus is the supernova remnant Messier 1, more commonly known as the Crab Nebula. One of the closest regions of active star formation, the Taurus-Auriga complex, crosses into the northern part of the constellation. The variable star T Tauri is the prototype of a class of pre-main-sequence stars. ==Characteristics== Taurus is a big and prominent constellation in the northern hemisphere's winter sky, between Aries to the west and Gemini to the east; to the north lie Perseus and Auriga, to the southeast Orion, to the south Eridanus, and to the southwest Cetus. In September and October, Taurus is visible in the evening along the eastern horizon. The most favorable time to observe Taurus in the night sky is during the months of December and January. By March and April, the constellation will appear to the west during the evening twilight.〔 This constellation forms part of the zodiac, and hence is intersected by the ecliptic. This circle across the celestial sphere forms the apparent path of the Sun as the Earth completes its annual orbit. As the orbital plane of the Moon and the planets lie near the ecliptic, they can usually be found in the constellation Taurus during some part of each year.〔 The galactic plane of the Milky Way intersects the northeast corner of the constellation and the galactic anticenter is located near the border between Taurus and Auriga. Taurus is the only constellation crossed by all three of the galactic equator, celestial equator, and ecliptic. A ring-like galactic structure known as the Gould's Belt passes through the Taurus constellation.〔 The recommended three-letter abbreviation for the constellation, as adopted by the International Astronomical Union in 1922, is "Tau".〔 The official constellation boundaries, as set by Eugène Delporte in 1930, are defined by a polygon of 26 segments. In the equatorial coordinate system, the right ascension coordinates of these borders lie between and , while the declination coordinates are between 31.10° and −1.35°.〔 Because a small part of the constellation lies to the south of the celestial equator, this can not be a completely circumpolar constellation at any latitude.〔 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「Taurus (constellation)」の詳細全文を読む スポンサード リンク
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