1564年2月15日，意大利天文学家伽利略·伽利略（d.1642）出生于比萨。 他是第一个了解数学可以真正描述物理世界的现代人。 他说：“自然之书是用数学写的。” [VD-HK于1646年逝世。]他因捍卫哥白尼体系而信奉天主教，该体系坚持认为地球围绕太阳旋转。 佛罗伦萨附近的Acetri。
原文：1564 Feb 15, Italian astronomer Galileo Galilei (d.1642) was born in Pisa. He was the first modern man to understand that mathematics can truly describe the physical world. He said: “The Book of Nature is written in mathematics.” [V.D.-H.K. dated his death to 1646] He ran afoul of the Catholic Church for defending the Copernican system, which maintained that the earth revolves around the sun. He died in Acetri, near Florence.