And you can't get any closer to the September equinox than this.
而这一天也是距秋分日近的不能再近的一天。
As the September 23rd equinox approaches, nights grow longer and a favorable season for aurora begins.
随着9月23日秋分的来临，夜晚越来越长，观测北极光的最佳季节开始了。
By common practice, the September equinox marks the beginning of autumn in the northern hemisphere, and the start of spring in the southern hemisphere.
通常，秋分就意味着整个北半球进入了秋季，与之相对的是南半球进入了春季。
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