The maximum distance of the earth from the sun is 9.3 × 107 mi. The minimum distance is 9.1 × 107 mi. The sun is at one focus of the elliptical orbit. Find the distance from the sun to the other focus.
The eccentricity of an ellipse is defined as e = c / a. For an ellipse, 0 < c < a, so 0 < e < 1, when e is close to 0, an ellipse appears to be nearly circular. When e is close to 1, an ellipse is very flat.