if all the planets of solar system are moving in the same speed which of them are having the greatest momentum
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The answer to this question lies partly in gravity, and partly in conservation of angular momentum
Planets revolve around the sun (or more appropriately, bary centre ) because of Gravitation . Gravity keeps pulling things towards itself, because of which planets revolve around sun, or other stars
P.S: the exact explanation of the above answer involves general theory of relativity, but for the sake of brevity i have left it out.
Rotation on other hand is due to conservation of angular momentum. Since planets (as a matter of fact,nearly everything in visible part of universe) is formed due to accretion of matter, the repeated collisions/ accretion of matters lead to condensation of matter in a very small space than it was before. Just like a ballet dancer pulls her hands in to increase speed, this condensation of matter in a smaller space causes bodies to rotate faster.
Planets revolve around the sun (or more appropriately, bary centre ) because of Gravitation . Gravity keeps pulling things towards itself, because of which planets revolve around sun, or other stars
P.S: the exact explanation of the above answer involves general theory of relativity, but for the sake of brevity i have left it out.
Rotation on other hand is due to conservation of angular momentum. Since planets (as a matter of fact,nearly everything in visible part of universe) is formed due to accretion of matter, the repeated collisions/ accretion of matters lead to condensation of matter in a very small space than it was before. Just like a ballet dancer pulls her hands in to increase speed, this condensation of matter in a smaller space causes bodies to rotate faster.
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