What field of study foundational to the scientific study of the Moon's surface was initiated by Galileo's lunar observations?

Answer

selenography

The clear mapping of the Moon’s imperfections laid the groundwork for modern selenography, which is the scientific study of the Moon's surface.

What field of study foundational to the scientific study of the Moon's surface was initiated by Galileo's lunar observations?
discoveryGalileoastronomyMooncraters