Invented in Europe in the first decade of the 1600s, Galileo (and later Kepler) wasted no time exploiting the new device for astronomical observations.
His realization was that the solution wouldn't come from improved astronomical readings, as many thinkers believed, but from an extremely accurate clock that could tell the time of the home port while at sea.
Seen in motion, this is at once a powerful skeleton clock and a curious astronomical one, a gift to anyone for whom a modern clock can do so much more than just tell the time.