Galileo's jovilabe, century Florence, Istituto e Museo di Storia della Scienza, inv. 3178 This instrument was designed to calculate the periods of Jupiter's moons. It is a complex analogue calculator to allow navigators to determine longitude at sea.
"At night, I open the window and ask the moon to come and press its face against mine. Breathe into me. Close the language-door and open the love-window. The moon won’t use the door, only the window." — Rumi (Ahh, I love you Rumi.