September Beijing will be reduced by 75 minutes of the day.

Technology Channel (tech.) Message: enter September, the weather getting cooler, it is catch-phrase is: The days are getting shorter, but how short how much? .Astronomers have been extrapolated into September, the day in Northeast China by short 2.8 minutes per day, north and northwest regional average of 2.3 minutes, and Central and East average of 1.8 minutes on average in South China .1.3 minutes. .Why do days get shorter? .Tianjin and Jiangsu, two of astronomy experts explained that every year in September, reduce the speed of the day the most obvious. .Tilt of the Earth's rotation, and revolution around the sun to do exercise, since from the summer solstice, the sun's direct point on the Earth daily southward; to the autumnal equinox day, the direct equator; after the autumnal equinox point to the direct sun south of the equator, so that distribution to the northern hemisphere .reduction of sunlight daily, so the Northern Hemisphere time of day shortened day by day. .Shorter days and longer this change, the more obvious areas of higher latitudes. .To this end, astronomy experts selected the city for a few representative calculations: September, 92 minutes less daylight in Harbin, Shenyang, 80 minutes, 75 minutes for the Beijing and Shanghai is 54 minutes, and Xiamen for 40 minutes. .</ P>.