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).
Une version vectorielle de cette image existe, dans le format « SVG ». Si elle n’est pas inférieure, elle devrait être utilisée à la place de la présente version pour des affichages en plus grandes dimensions ou nécessitant une meilleure résolution.
Ou bay pèmisyon pou kopye, distribye ak/oswa modifye dokiman sa a dapre kondisyon GNU Free Documentation License, Vèsyon. 1.2 oswa nenpòt vèsyon ki pibliye pita pa Free Software Foundation; san okenn Seksyon ki pa ka chanje, pa gen okenn Tèks ak premye paj kouvèti, epi pa gen okenn Tèks Denyè-Kouvèti. Gen yon kopi lisans lan nan seksyon ki rele GNU Free Documentation License.http://www.gnu.org/copyleft/fdl.htmlGFDLGNU Free Documentation Licensetruetrue
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Selon kondisyon sa a yo:
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Ce bandeau de licence a été ajouté à ce fichier dans le cadre de la procédure de mise à jour des licences des images sous GFDL.http://creativecommons.org/licenses/by-sa/3.0/CC BY-SA 3.0Creative Commons Attribution-Share Alike 3.0truetrue