Nicolaus Copernicus - Astronomer - The Sun, not the Earth, is at the center of the universe.

Today we climb a chilly tower stair in Royal Prussia, where sea wind presses against old brick and a bellrope hums in the draft. The town is Frombork—Frauenburg in the Latin letters of the time—perched on the Vistula Lagoon. Below us a canon’s garden is squared into beds; a copper astrolabe hangs near a window to warm just enough that fingers won’t sting when they touch it at dusk; a long wooden staff with sliding crosspieces leans beside a stool. In the narrow room, a man in a dark robe writes in a practiced hand with a patience that does not look like hesitation. He is not a court philosopher. He is not a cloistered mystic. He is a chapter functionary, a physician, an administrator, a careful observer. He is Nicolaus Copernicus, a ...