Question
In the solar system, which is conserved
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Answer
In the solar system, the orbit of a planet is an ellipse with the Sun at one of the two foci.
velocity of the planet at every point on orbit will not be same, so momentum and Kinetic energy can not be conserved. The angular velocity will also vary. But the total enengy $(K E+P E)$ will remain conserved for the system.
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