How well do you know the Moon? Take this twenty-question quiz and see! Don't worry, there are no grades on this quiz. Most of the answers can also be found in my book, The Big Splat.

16. I built a 20-power telescope in 1609 and was the first person to publish detailed observations of the Moon through a telescope. Though I later became famous for teaching that Earth is not the center of the solar system, I was actually chided by one of my contemporaries in 1597 for my reluctance to advocate this theory in public. Who was I?

(A) Nicolaus Copernicus

(B) Johannes Kepler

(C) Galileo Galilei

(D) Isaac Newton

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