German astronomer and mathematician. Considered the founder of modern astronomy,he formulated three laws to clarify the theory that the planets revolve around the sun.

• 开普勒，约翰尼斯1571－1630德国天文学家和数学家，被认为是现代天文学的奠基人，他创立了三大定律，说明行星围绕太阳转的理论。