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I might be wrong. Please correct me. In planetary motion or in the size of galaxies:

(a) The gravitational attraction of a body, say sun and the force from other planets, creates the elliptical shapes, right?

(b) If the gravitational force of any one body is high than the other, the ellipse or rather the eccentricity will increase. Will it result in the shape of a parabola or hyperbola?

I mean to say that the shape of a ellipse is due to the gravitational attraction. What would happen for stronger and more stronger gravitational force? Would the shape of the orbit change?

-- Shounak

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# Gravity and shapes

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