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| Description: Johannes Kepler (1571–1630) Three laws of planetary motion Orbits of the planets are elliptical Planets revolve around the Sun at varying speed There is a proportional relation between a planet’s orbital period and its distance to the Sun (measured in astronomical units (AU’s) – one AU averages about 150 million kilometers, or 93 million miles) Galileo Galilei (1564–1642) Supported Copernican theory Used experimental data Constructed an astronomical telescope in 1609 Four large moons of Jupiter Planets appeared as disks Phases of Venus Features on the Moon Sunspots Picture Stats: Views: 248 Filesize: 710.82kB Height: 839 Width: 715 Source: https://biology-forums.com/index.php?action=gallery;sa=view;id=39649 |