Labels:clock | crt screen | monitor | retaining wall | sky | telescope OCR: KEP L ER LAW MOTI ON The empirical laws governing the motion 10 planets in their orbits, first noted by Johannes Kepler 1571 1630 These are (a) the orbits of the planets are ellipses with the Sun common focus; b planet moves planet in and its sun orbit sweeps the line joining equal the areas over in equal intervals of time (also called the law of equal areas): c the squares Major Axis of the periods of revolution of any two planets are proportional to the cubes of Aphel their mean distances from the sun Minor Axis three enba helior
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