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At 09:05 UTC (05:05 Eastern US time) this morning, the position of the center of the Sun’s disk, moving south, crossed the celestial equator on the sky. For normal people, this means it was the moment of the autumnal equinox. Some people like to call this the first day of autumn, which is fine, but Broadcasting platform : YouTube Source : Bad Astronomy Discovery Date : 23/09/2011 17:28 Number of articles : 2