Image:Equinox positions.png
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Equinox_positions.png (742 × 236 pixels, taille du fichier : 10 Kio, type MIME : image/png)
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[edit] Summary
Positions of the vernal equinox 1500 BC, 500 BC and AD 150.
Generated with xephem, a program published under the GPL.
The red line is a section of the apparent path traced by the Sun through the Earth's year. The red/green line is a projection of the Earth's equator on to the celestial sphere. The crossing point of these two lines is the spring equinox. In 1500 BC it was near the end of the Aries constellation, in 500 BC it was near the beginning of the Aries constellation and in AD 150 (the time of Ptolemy) it was in the center of the Pisces constellation).
source : http://en.wikipedia.org/wiki/Image:Equinox_positions.png
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| Date et heure | Dimensions | Utilisateur | Commentaire | |
|---|---|---|---|---|
| actuel | 3 novembre 2006 à 12:32 | 742×236 (10 Kio) | Thecole | (Positions of the vernal equinox 1500 BC, 500 BC and AD 150. Generated with xephem, a program published under the GPL. The red line is a section of the apparent path traced by the Sun through the Earth's year. The red/green line is a projection of the Ea) |
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