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This tag is for questions regarding the Newtonian model of gravity in which the force between two objects is given by $~GMm/r^2~.$ It is a natural phenomenon by which all things with mass or energy – including planets, stars, galaxies, and even light – attract one another. On Earth, gravity gives weight to physical objects, and the Moon's gravity causes the ocean tides.

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Why orbital ellipse? [closed]

Of what exactly depends the eccentricity? I suppose that the smaller orbit its eccentricity will be greater, reason why it is closer to forming a circumference, but because the comment halley has grea …
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0 votes
2 answers
398 views

Third law of Kepler [closed]

I can not find any solution to this exercise on the internet. Calculate the mean radius of the orbit of a fictitious planet X, expressed in kilometers and UA, so that its orbital period is 1.9x1 …
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