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Eccentricity of Orbiting PlanetsEllipses in the real world
The eccentricy of an ellipse is a measure of how nearly circular the ellipse is. Eccentricity is found by the following formula
eccentricity = c/a
Use the formula for eccentricity to determine the eccentricity of the imaginary planet's orbit.
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Use the eccentricity of the ellipse to determine where the focus (sun) is in the imaginary example below
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The eccentricity of the orbit of the planet below is 0.8 and the value of c is 20. What is the value of this planet's semi-major axis (semi-major axis = a in ellipse's equation)?
![]() Eccentricities and Orbits of Real Planets in our Solar System
The eccentricity of mars is.093 and the value of c is 132,000,000 miles. What is the value of Mar's semi-major axis (semi-major axis = a in ellipse's equation)?
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