In 1609-10, Galileo's contemporary Thomas Harriot was also drawing the moon: http://galileo.rice.edu/sci/harriot_moon.html http://galileo.rice.edu/sci/harriot_

In 1609-10, Galileo's contemporary Thomas Harriot was also drawing the moon: http://galileo.rice.edu/sci/harriot_moon.html http://galileo.rice.edu/sci/harriot_moon.html Interestingly, in his first drawing (made before seeing Galileo's drawings), there is no sense at all that the unevenness of the shadow across the moon is a sign that there are valleys and mountains on the moon. He looked at the same thing as Galileo, but possibly because he was a much less accomplished artist, didn't recognize what he was seeing as depth. I read about this in a book called The Invention of Science--absolutely fascinating.