Earth rotates once in about 24 hours with respect to the Sun, but once every 23 hours, 56 minutes and 4 seconds with respect to other distant stars. Scientists call this difference crucial to ...
Meteorological fall began on Sept. 1, while astronomical fall starts with the autumnal equinox at 2:19 p.m. ET on Monday, Sept. 22. Astronomical seasons are based on the Earth's position relative to ...
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