Today, we have twelve hours of daylight and twelve hours of darkness. Tomorrow, the days start to be longer than the nights. It's all to do with the fact that the earth leans on the universe like a bicycle against a wall (or "the obliquity of the ecliptic", about 23.5 degrees).
These pictures have absolutely nothing to do with the Vernal Equinox.
Or do they?
Saturday, 20 March 2010
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