Centaurus Constellation Map

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图注： The constellation Centaurus with its bright stars and surrounding constellations. Centaurus is surrounded by (going clockwise from the top): Hydra, Antlia, Vela, Carina, Musca, Crux, Circinus, Lupus and Libra. Centaurus is a large constellation most notable for its brightest star Alpha Centauri. Alpha Centauri is a triple star system and is the nearest star system to the Solar System. When viewed with the naked eye, the two brightest components of Alpha Centauri appear as one star. The combined light from these two stars makes Alpha Centauri appear as the third brightest star in the night sky. The third component of the Alpha Centauri system Proxima Centauri, the nearest star to the Sun, is too faint to be viewed with the naked eye. Centaurus is a southern constellation and thus the whole constellation is visible from the southern hemisphere at some point in the year. The whole constellation is also visible from equatorial regions of the northern hemisphere with parts of the constellation visible from temperate northern regions. The constellation is best viewed in the evening in the late northern hemisphere spring and late southern hemisphere autumn. The globular cluster Omega Centauri, also known as NGC 5319, lies in Centaurus. Bright enough to be seen with the naked eye, this cluster was initially given a designation as a star in the constellation before its true nature was realised. It is marked here with a yellow circle with a plus sign superimposed on it. As is the globular cluster NGC 5286. The open cluster NGC 3766 is marked here with a yellow circle. NGC 5128, also known as Centaurus A, is the closest active galaxy to Earth. The supermassive black hole at the heart of this galaxy has launched two huge jets of matter which emit in many different wavelengths including x-ray and radio emission. NGC 5128 is marked with a red ellipse here, as is the edge-on spiral galaxy NGC 4945. The y-axis of this diagram is in degrees of declination with north as up and the x-axis is in hours of right ascension with east to the left. The sizes of the stars marked here relate to the star's apparent magnitude, a measure of its apparent brightness. The larger dots represent brighter stars. The Greek letters mark the brightest stars in the constellation. These are ranked by brightness with the brightest star being labeled alpha, the second brightest beta, etc., although this ordering is not always followed exactly. The dotted boundary lines mark the IAU's boundaries of the constellations and the solid green lines mark one of the common forms used to represent the figures of the constellations. The blue line in the top left is the ecliptic. Neither the constellation boundaries, nor the line marking the ecliptic, nor the lines joining the stars appear on the sky.
来源： Adapted by the IAU Office of Astronomy for Education from the original by the IAU and Sky & Telescope
来源链接

词汇表: 视星等 , 天球坐标 , 星座 , 赤纬 , 球状星团 , 赤经（RA） , 疏散星团 , 半人马座 α
分类： 肉眼天文学

授权许可： 知识共享许可协议 署名 4.0 国际 (CC BY 4.0) 知识共享许可协议 署名 4.0 国际 (CC BY 4.0) 图标

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Coma Berenices Constellation Map

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图注： The constellation Coma Berenices with its brighter stars and surrounding constellations. Coma Berenices is surrounded by (going clockwise from the top): Canes Venatici, Ursa Major, Leo, Virgo and Boötes. This constellation has relatively few bright stars. Coma Berenices is a northern constellation close to the celestial equator. As such the whole constellation is visible at some point in the year everywhere on Earth except the most antarctic regions. The constellation is best viewed in the evening in the northern hemisphere late spring and southern hemisphere late autumn. Coma Berenices is home to a large cluster of galaxies known as the Coma Supercluster. However none of the galaxies in this cluster are marked on this diagram as they are too faint to observe with most amateur telescopes. The elliptical galaxy M85 and the spiral galaxy M100 are members of the nearer Virgo cluster of galaxies. These are marked with red ellipses as are the even nearer M64 and NGC 4565, both of which are spiral galaxies. The globular cluster M53, marked here with a yellow circle with a plus sign superimposed on it, also lies in Coma Berenices. The y-axis of this diagram is in degrees of declination with north as up and the x-axis is in hours of right ascension with east to the left. The sizes of the stars marked here relate to the star's apparent magnitude, a measure of its apparent brightness. The larger dots represent brighter stars. The Greek letters mark the brightest stars in the constellation. These are ranked by brightness with the brightest star being labeled alpha, the second brightest beta, etc., although this ordering is not always followed exactly. The dotted boundary lines mark the IAU's boundaries of the constellations and the solid green lines mark one of the common forms used to represent the figures of the constellations. The blue line at the bottom right of the diagram marks the ecliptic. Neither the constellation boundaries, nor the line marking the ecliptic, nor the lines joining the stars appear on the sky.
来源： Adapted by the IAU Office of Astronomy for Education from the original by the IAU and Sky & Telescope
来源链接

词汇表: 视星等 , 天球坐标 , 星系团 , 星座 , 赤纬 , 黄道 , 椭圆星系 , 狮子座 , 赤经（RA） , 漩涡星系 , 室女座
分类： 肉眼天文学

授权许可： 知识共享许可协议 署名 4.0 国际 (CC BY 4.0) 知识共享许可协议 署名 4.0 国际 (CC BY 4.0) 图标

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Columba Constellation Map

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图注： The constellation Columba with its bright stars and surrounding constellations. Columba is surrounded by (going clockwise from the top): Lepus, Caelum, Pictor, Puppis and Canis Major. Columba is a southern constellation and thus is visible to the whole southern hemisphere at some point in the year. The whole constellation is also visible from equatorial and some temperate regions of the northern hemisphere. The globular cluster NGC 1851 lies in Columba and is marked here with a yellow circle with a plus sign superimposed on it. The y-axis of this diagram is in degrees of declination with north as up and the x-axis is in hours of right ascension with east to the left. The sizes of the stars marked here relate to the star's apparent magnitude, a measure of its apparent brightness. The larger dots represent brighter stars. The Greek letters mark the brightest stars in the constellation. These are ranked by brightness with the brightest star being labeled alpha, the second brightest beta, etc., although this ordering is not always followed exactly. The dotted boundary lines mark the IAU's boundaries of the constellations and the solid green lines mark one of the common forms used to represent the figures of the constellations. Neither the constellation boundaries, nor the lines joining the stars appear on the sky.
来源： Adapted by the IAU Office of Astronomy for Education from the original by the IAU and Sky & Telescope
来源链接

词汇表: 视星等 , 天球坐标 , 星座 , 赤纬 , 赤经（RA）
分类： 肉眼天文学

授权许可： 知识共享许可协议 署名 4.0 国际 (CC BY 4.0) 知识共享许可协议 署名 4.0 国际 (CC BY 4.0) 图标

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Vela Constellation Map

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图注： The constellation Vela with its bright stars and surrounding constellations. Vela is surrounded by (going clockwise from the top): Pyxis, Puppis, Carina, Crux, Centaurus and Antlia. Vela is a southern constellation and thus the whole constellation is visible at some point in the year throughout the southern hemisphere. The whole constellation is also visible from equatorial regions of the northern hemisphere with parts of the constellation visible from most temperate northern hemisphere regions. Vela is best viewed in the evening in the northern hemisphere spring and southern hemisphere autumn. The planetary nebula NGC 3132 lies in Vela and is marked here with a green circle superimposed on a plus sign. The globular cluster NGC 3201 also lies in Vela and is marked here with a yellow circle with a plus sign superimposed on it. A yellow circle marks the position of the open cluster IC 2391. The y-axis of this diagram is in degrees of declination with north as up and the x-axis is in hours of right ascension with east to the left. The sizes of the stars marked here relate to the star's apparent magnitude, a measure of its apparent brightness. The larger dots represent brighter stars. The Greek letters mark the brightest stars in the constellation. These are ranked by brightness with the brightest star being labeled alpha, the second brightest beta, etc., although this ordering is not always followed exactly. Vela was previously part of the larger Argo Navis constellation along with Puppis and Carina. As the letter designations for stars were created before this division took place, Greek letter designations are now divided between the three constellations with Vela having stars designated gamma and delta but no alpha or beta. The dotted boundary lines mark the IAU's boundaries of the constellations and the solid green lines mark one of the common forms used to represent the figures of the constellations. Neither the constellation boundaries, nor the lines joining the stars appear on the sky.
来源： Adapted by the IAU Office of Astronomy for Education from the original by the IAU and Sky & Telescope
来源链接

词汇表: 视星等 , 天球坐标 , 星座 , 赤纬 , 赤经（RA）
分类： 肉眼天文学

授权许可： 知识共享许可协议 署名 4.0 国际 (CC BY 4.0) 知识共享许可协议 署名 4.0 国际 (CC BY 4.0) 图标

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Tucana Constellation Map

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图注： The constellation Tucana with its bright stars and surrounding constellations. Tucana is surrounded by (going clockwise from the top): Grus, Indus, Octans, Hydrus, Eridanus and Phoenix. Tucana is a southern constellation and thus the whole constellation is visible at some point in the year throughout the southern hemisphere. The whole constellation is visible to some equatorial regions of the northern hemisphere with parts of the constellation visible to the remaining northern equatorial regions. Tucana is best viewed in the northern hemisphere autumn and southern hemisphere spring. The Small Magellanic Cloud (SMC), a satellite galaxy of the Milky Way lies in Tucana with a small part spilling over into the neighbouring constellation of Hydrus. The SMC is marked here with a green loop in the south east of Tucana. The globular clusters NGC 104, also known as 47 Tucanae or 47 Tuc, and NGC 362 lie in Tucana and are marked here with yellow circles with plus signs superimposed on them. While these two clusters appear close to the SMC on the sky, they are both significantly closer than that satellite galaxy. The y-axis of this diagram is in degrees of declination with north as up and the x-axis is in hours of right ascension with east to the left. The sizes of the stars marked here relate to the star's apparent magnitude, a measure of its apparent brightness. The larger dots represent brighter stars. The Greek letters mark the brightest stars in the constellation. These are ranked by brightness with the brightest star being labeled alpha, the second brightest beta, etc., although this ordering is not always followed exactly. The dotted boundary lines mark the IAU's boundaries of the constellations and the solid green lines mark one of the common forms used to represent the figures of the constellations. Neither the constellation boundaries, nor the lines joining the stars appear on the sky.
来源： Adapted by the IAU Office of Astronomy for Education from the original by the IAU and Sky & Telescope
来源链接

词汇表: 视星等 , 天球坐标 , 星座 , 赤纬 , 球状星团 , 赤经（RA） , 小麦哲伦云（SMC）
分类： 肉眼天文学

授权许可： 知识共享许可协议 署名 4.0 国际 (CC BY 4.0) 知识共享许可协议 署名 4.0 国际 (CC BY 4.0) 图标

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