চিত্র:Crux constellation map.png
উইকিপিডিয়া, মুক্ত বিশ্বকোষ থেকে
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| এই ফাইলটি উইকিমিডিয়া কমন্স থেকে নেয়া। সেখান থেকে নেয়া ছবিটির বিশদ বর্ণনা নিম্নে প্রদর্শিত হল। |
en: This is a celestial map of the constellation Crux, the Southern Cross.
Copyright © 2003 Torsten Bronger.
It was created by Torsten Bronger using the program PP3 on 2003/08/18. At PP3's homepage, you also get the input scripts necessary for re-compiling the map.
The yellow dashed lines are constellation boundaries, the red dashed line is the ecliptic, and the shades of blue show Milky Way areas of different brightness. The map contains all Messier objects, except for colliding ones. The underlying database contains all stars brighter than 6.5. All coordinates refer to equinox 2000.0.
The map is calculated with the equidistant azimuthal projection (the zenith being in the center of the image). The north pole is to the top. The (horizontal) lines of equal declination are drawn for 0°, ±10°, ±20° etc. The lines of equal rectascension are drawn for all 24 hours. Towards the rim there is a very slight magnification (and distortion).
这是南十字座的星图。
图中黄色虚线为星座的分界线，红色虚线为黄道，蓝色阴影为不同亮度的银河。所有梅西耶天体都包括在图中。编制星图所使用的数据库包含了所有视星等大于6.5的星。星图的所有坐标皆以春分／秋分（2000.0）为参考。
这星图是以地平经度等距投影法来计算出的（地平经度位于星图的中心）。北极是在图的上方。那些水平的赤纬线都是0°、±10°、±20°……而赤经线则是0h、1h、2h……星图中央的比例大约为11.8像素／度，从星图的中心向外就会有轻微的放大（及扭曲）。
Copyright © 2003 Torsten Bronger.
这星图的原版本是由原作者Torsten Bronger利用PP3程序于2003年2月22日编制出来的。您可在PP3的首页取得所需的输入脚本来重编这图像。
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