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December 6, 2011

December 6, 2011. Objective Determine the eccentricity of orbits. Agenda Sun Path Lab Part A Eccentricity notes Ellipse Lab. ECCENTRICITY . REVOLUTION OF THE EARTH. Earth's orbit around the sun is a closed curve called an ellipse . Eccentricity.

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December 6, 2011

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  1. December 6, 2011

  2. Objective Determine the eccentricity of orbits Agenda Sun Path Lab Part A Eccentricity notes Ellipse Lab

  3. ECCENTRICITY

  4. REVOLUTION OF THE EARTH • Earth's orbit around the sun is a closed curve called an ellipse.

  5. Eccentricity • A number that shows how round or flat an ellipse is. • A perfect circle = 0 • A straight line = 1

  6. d= distance between foci L= length along horizontal axis Eccentricity is d divided by L. d/L

  7. VARYING DISTANCES OF THE EARTHFROM THE SUN • We are closest to the sun on January 3 and furthest away on July 4 due to the elliptical shape of our orbit.

  8. Eccentricity of Earth • .017 • it is nearly a perfect circle. • The sun's apparent diameter will look largest on January 3 and smallest on July 4.

  9. ORBITAL SPEED • January 3rd: Highest orbital speed, highest kinetic energy, lowest potential energy • July 4th: Lowest orbital speed, lowest kinetic energy, highest potential energy

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