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Astronomy Assessment
Lesson: Ellipses

(1) Please label all of the parts of the ellipse that you know:

(2) What is the definition of eccentricity? (Please explain in words and with a mathematical equation)
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Equation:

(3) What is the eccentricity of this ellipse:

(4) Draw an ellipse using the method we used in the lesson:

(a) What is the sum of the distance from any point on the ellipse to each focus?

(b) What is the eccentricity?

(c) What is the distance from each focus to the center?

(5) If the Earth’s eccentricity were 0.2, how would we feel the effects and why?
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