Solar culmination: the angle of sunlight
| During the yearly revolution of the Earth around the Sun, the inclination of the earth towards the sun changes (see example image). During the northern solstice on 21 June, the Northern Hemisphere is most inclined to the sun, and receives most of the sunlight. Six months later, on 21 December, the earth reaches the Southern solstice, when the Southern Hemisphere is most inclined towards the sun, and receives most of the sunlight. This change of the position of the sun leads to different Daylengths and to the Seasons . |
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Soleil sur la terre
| Pendant sa rotation autour du soleil, la terre change sa inclination vers le soleil. Ça fair changer pendant l'année l'angle dans lequel la lumière du soleil arrive sur la terre, et la partie de la terre qui est illuminée. Les images montrent quatre périodes de l'année. Quelles différences est-ce que vous pouvez identifier ? |
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