Arcetri is a small town in Italy where Galileo and his adult daughter Maria Celeste lived within walking distance of one another. One might think that she, a Catholic nun, and he, a scientist/philosopher, may have thought vastly different things when gazing up at the moon. Not so. They thought of each other, of God's magnificent skies, of everyday minutiae.
Well, to be fair, Galileo was thinking about a few other things, too.