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Definition of autumn equinox in English: autumn equinox(also autumnal equinox) noun 1The equinox in autumn, on about 22 September in the northern hemisphere and 20 March in the southern hemisphere. 秋分（北半球约在9月22日，南半球约在3月20日） Example sentencesExamples - The Council will be held at the autumn equinox in a few weeks from now.
- Sunlight is continuous throughout the summer, but after the solstice the sun slowly sinks to the horizon until it drops below on the autumn equinox.
- The autumnal equinox was more than a month ago on September 23 and we are just 56 days short of the shortest day which falls on December 22.
- They are seasonal visitors which migrate to warmer waters when the days get shorter after the autumn equinox.
- Make a portrait of the north woods in upper Minnesota over the ninety days between the autumn equinox and winter solstice.
- Although it marks the autumnal equinox here, it is still a good time for tree planting and a time of vigorous growth.
- The equal light and dark provides the scientific term for the beginning of fall - the autumnal equinox in the Northern Hemisphere.
- In ancient times, fasts were traditional at the vernal and autumnal equinoxes and were believed to increase fertility.
- The autumnal equinox occurs in March in the Southern Hemisphere, and the spring equinox occurs in September.
- The autumnal equinox occurs on September 22 at 1: 27 P.M., when Earth reaches a position in its orbit that brings the Southern Hemisphere closer to the Sun.
- In the plate's center is a representation of the star cluster Pleiades, which appears in the sky around the autumnal equinox and signaled the arrival of harvest season.
- The autumn equinox was 22nd September but I'll be celebrating it with friends and family today.
- Thus, Libra is Libra because it comes in the autumn equinox, when the Sun spreads its light equally over both hemispheres.
- He disappeared off Iceland in the storms of the autumn equinox of 1942, poor chap.
- The Sun only sets precisely due west on the day of the spring or autumn equinox.
- That full Moon is known as the harvest Moon: the full Moon closest to the autumnal equinox in the Northern Hemisphere.
- On a brilliant early morning of the autumnal equinox, Rose and I made our way down to the banks of a nearby river where we read letters of commitment to each other.
- Similarly, the autumnal equinox and winter solstice represent the astronomical beginnings of autumn and winter.
- At the autumnal equinox, we celebrate last harvest, or Mabon.
- In ancient Egypt and Persia New Year began on September 21, at the autumnal equinox, when day and night were of equal length.
- 1.1Astronomy The equinox in September.
〔天文〕（9月的）秋分 Example sentencesExamples - The vernal and autumnal equinoxes occur when the ecliptic crosses the celestial equator, so linking stars, sun and earth through the passage of time.
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