File:Earth's axial tilt and seasons.webm
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Earth's_axial_tilt_and_seasons.webm (file size: 9.49 MB, MIME type: video/webm)
Summary
| Description |
English: On the left animation, the inclination of the terrestrial axis of 23.4° is maintained. But because of its revolution around the Sun, the Earth turns a different part of its exposed surface forwards, which causes variations of sunlight during the year, and so the cyclical sequence of the seasons.
The animation on the right shows the Earth on the side where it is illuminated. In yellow, the solar declination line oscillates between the Tropic of Cancer (at latitude 23.4° North) in the northern hemisphere and the Tropic of Capricorn (at latitude 23.4° South) in the southern hemisphere. Along that line, the solar radiation is optimal at every moment of the day, reaching its maximum when the sun is oriented due south.
Français : Sur l’animation de gauche, l’inclinaison de l’axe terrestre de 23,4° se maintient. Mais du fait de sa rotation autour du Soleil, la Terre oriente vers l’avant une partie différente de sa surface exposée, ce qui occasionne des variations d’ensoleillement au cours de l’année, et donc l’enchaînement cyclique des saisons.
L’animation de droite montre la Terre du côté où elle est éclairée. En jaune, la ligne de déclinaison solaire oscille entre le tropique du Cancer (à 23,4° de latitude Nord) dans l’hémisphère Nord et le tropique du Capricorne (à 23,4° de latitude Sud) dans l’hémisphère Sud. Le long de cette ligne, le rayonnement solaire est optimal à chaque instant de la journée, atteignant son maximum lorsque le soleil est plein sud. |
| Date | |
| Source | Own work |
| Author | Le Grand Quadrille |
created with GeoGebra Classic
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File history
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| Date/Time | Dimensions | User | Comment | |
|---|---|---|---|---|
| current | 16:29, 19 March 2025 | (9.49 MB) | Le Grand Quadrille | Centering the right view on the axis pointing towards the Sun |
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