GoKawiilAstronomical Autumn Begins in Northern Hemisphere with 2026 Fall Equinox
The fall equinox marks the official start of astronomical autumn in the Northern Hemisphere, occurring when the sun crosses the celestial equator and day and night are nearly equal in length. Despite lingering warm weather in many regions, the equinox signals that cooler temperatures typically follow in the weeks ahead.
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The equinox is a fixed astronomical marker used to track seasonal change, distinct from the more variable meteorological definitions some forecasters use. For many, it serves as a seasonal cue to expect shifting weather patterns even when current conditions haven't yet caught up.
- The fall equinox marks the astronomical start of autumn in the Northern Hemisphere.
- It occurs when day and night lengths are nearly equal.
- Cooler weather often follows, even if current temperatures remain warm.
Celestron StarSense Explorer Telescope — The equinox is a great reminder of how Earth's tilt and orbit shape our seasons, and there's no better way to explore that connection than by observing the night sky yourself. The StarSense Explorer uses your smartphone to help pinpoint stars, planets, and celestial events, making it perfect for stargazing as the nights grow longer with autumn's arrival.
See Celestron StarSense Explorer Telescope on Amazon → Affiliate link — we may earn a commission on purchases, at no extra cost to you. Product picked by AI based on this article; it is not a tested recommendation.Source: fastcompany.com, 2026-09-22
Published there as: “Fall Equinox 2026: What it means and when it happens”
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