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# physics doubt.

do anybody know why planets orbits in an elliptical path?why it is not a circle? circle is a simple geometry.

Note by Sreehari Vp
3 years, 9 months ago

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Though circle is a simple geometry but the planets are kept in their orbits by a central force i.e. gravitation. Central forces are any force that follows inverse square law of distance. Now, by using really great partial differential mathematics, it can be proved that for orbiting in the influence of any central force, the orbit must be elliptical in shape.

- 3 years, 9 months ago

Its due to inertia of the planet.

- 3 years, 9 months ago

then why it is ellipse?why it can't be a circle?

- 3 years, 9 months ago