Wire report
Starwatch: Autumnal equinox in northern hemisphere, spring in the south
Precise moment of equinox in UK is 1.05am on Wednesday – but day and night will not be equal until Friday The September or autumnal equinox takes place this week. It marks the astronomical beginning of autumn in the northern hemisphere and spring in the southern hemisphere. This year, the precise moment of the equinox falls at 01.05 BST on 23 September. It is commonly said the equinox is when day and night are equal, because the name derives from the Latin for “equal night”, but in practice that is not quite true. An equinox occurs when the sun crosses the celestial equator, the imaginary projection of Earth’s equator into the sky. Continue reading...
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Precise moment of equinox in UK is 1.05am on Wednesday – but day and night will not be equal until Friday The September or autumnal equinox takes place this week. It marks the astronomical beginning of autumn in the northern hemisphere and spring in the southern hemisphere. This year, the precise moment of the equinox falls at 01.05 BST on 23 September. It is commonly said the equinox is when day and night are equal, because the name derives from the Latin for “equal night”, but in practice that is not quite true. An equinox occurs when the sun crosses the celestial equator, the imaginary projection of Earth’s equator into the sky. Continue reading...
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What happened
According to The Guardian’s source item, Starwatch: Autumnal equinox in northern hemisphere, spring in the south, Precise moment of equinox in UK is 1.05am on Wednesday – but day and night will not be equal until Friday The September or autumnal equinox takes place this week. It marks the astronomical beginning of autumn in the northern hemisphere and spring in the southern hemisphere. This year, the precise moment of the equinox falls at 01.05 BST on 23 September. It is commonly said the equinox is when day and night are equal, because the name derives from the Latin for “equal night”, but in practice that is not quite true. An equinox occurs when the sun crosses the celestial equator, the imaginary projection of Earth’s equator into the sky. Continue reading…
Context
The development sits in VINI’s Science file for readers following research, health, climate, space, medicine, and scientific institutions. The original report is linked so readers can check the source account, follow later updates, and compare new coverage against the first published record. The source item is dated 2026-09-21T05:00:36+00:00.
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Source
Primary source: Starwatch: Autumnal equinox in northern hemisphere, spring in the south via The Guardian. VINI cites and links the source; it does not reproduce the publisher’s full article text without rights clearance.
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Source links
- Starwatch: Autumnal equinox in northern hemisphere, spring in the southThe Guardian - 2026-09-21T05:00:36+00:00
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