Anaximander (an-ax-e-man'-der), a philosopher and famous mathematician of the Ionian school, born in 610 B.C. He was the first who noticed the obliquity of the ecliptic, and taught that the moon is indebted for her light to the sun, and that the earth is round. He constructed a sphere to represent the heavenly divisions, and is said to have invented geographical charts and the gnomon. He also believed in a multitude of worlds. He died, 546 B.C.

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