What did Galileo's analytical application of optics and geometry to the Moon establish, according to the text?

Answer

A rudimentary system of lunar altimetry

By watching how shadows lengthened and shortened, Galileo deduced vertical relief, demonstrating a sophisticated scientific approach akin to establishing a rudimentary system of lunar altimetry using light and shadow.

What did Galileo's analytical application of optics and geometry to the Moon establish, according to the text?
discoveryGalileoastronomysurfaceMoon