The Sumerians are thought to have formed the first human civilization in world history. They lived in southern Mesopotamia, between the Tigris and Euphrates Rivers in the Middle East. Cradle of Civilization. Many historians think that cities and towns were first formed in Sumer around 5000 BC.
At noon, on March 21 and September 23rd are the vernal and autumnal equinoxes. The sun is directly overhead at the equator at these times. On June 22nd is the summer solstice, in the Northern Hemisphere. The sun is at the 23.5 degrees Northern latitude.
Since the Earth's axis is tilted 23.5 degrees, then on this particular day, the Sun's rays are striking the Earth directly at a latitude approximately 23.5 degrees north of the equator (that is, the Sun's rays are coming in at an angle of 90 degrees here; this is the subsolar point). View answerHide answer. 2  The Sun at noon would be 23.5 degrees above the horizon. 3  The Sun's altitude at 23.5 degrees north is 90 degrees (directly overhead). 4  The difference in latitude between the subsolar point (23.5 degrees north) and the North Pole (90 degrees north) is 66.5, and 90-66.5=23.5.