Which Dutch astronomer and physicist, who discovered the rings of Saturn in the mid 1650's, is creditied with building the first pendulum clock?
which dutch astronomer and physicist, who discovered the rings of saturn in the mid 1650's, is creditied with building the first pendulum clock
FreebaseQA-train-14767.P0 FreebaseQA-train-14767.P1
pendulum clock rings of saturn
pendulum clock rings of saturn
m.067wf m.03w2n3
law.invention.inventor astronomy.astronomical_discovery.discoverer
m.0bkzt
christiaan huygens
m.0bkzt
christiaan huygens