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Autumn equinox begins in the Northern Hemisphere

The Northern Hemisphere enters autumn at 00:05 Paris time on September 23, 2026.

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This astronomical event marks equal day and night duration.

Temperatures and ecosystems will gradually adapt to the new season.

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Hémisphère Nord #équinoxe #automne #astronomie #hémisphère Nord #saison

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Auto-synthesis from 1 media source · identified on September 22, 2026

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