PPT Slide
1581 Constancy of period of pendulum
1589 Showed that objects fall at the same rate independent of mass
1592 Suggests that physical laws of the heavens are the same as
1592 Primitive thermometer
1600 Study of sound and vibrating strings
1604 distance for falling object increases as square of time
1610 Observes the phases of Venus
1610 Observes moons of Jupiter
1610 Observes craters on the moon
1610 Observes stars in the Milky Way
1610 Observes structures around Saturn
1613 Principle of inertia
1632 Support for Copernicus' heliocentric theory