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Add to table of Contents: Kepler’s 1st Law Pg. 6 Laws of Planetary Motion Pg. 7

Kepler’s Laws of Planetary Motion Pg. 7 Law of ellipses – The orbits of the planets are ellipses, with the Sun at one focus of the ellipse.

Laws of Planetary Motion 2. Law of equal areas – an orbiting object sweeps through equal areas in equal periods of time. he orbits of the planets are ellipses, with the Sun at one focus of the ellipse.

Laws of Planetary Motion 3. Law of periods(harmonies) – average distance of a planet from the sun(a3) is proportional to the square of its orbital period(time it takes to orbit the sun)=T2 a3 α T2 1 Astronomical Unit =149,597,871 km 1 solar mass =1.9891 × 1030 kg This was used to calculate how far away the planets are from the sun.

Kepler’s Law lab

Eccentricity (e) e = c/a