We cannot move a finger without disturbing all the stars.Explain.
Newton` Law is said to be an approximation to Kepler`s law.Why?
What is the radius of the sun?
If you move a finger, entropy gets disturbed. As the total entropy in the universe always increases, (some) stars need to get disturbed to balance the disturbance in entropy, caused by the finger.
nothing to do with entropy , its just that when you move your finger the distance between your finger and the star changes though by an infinitesimal amount but it does , so by inverse square law of gravi stars acceleration changes
moving the finger has nothing to do with entropy.consider your finger and stars as a system. there should obviouly be a centre of mass for this system.the movement of one thus results in the movement of other as gravitational force is an internal force.
Hey Manoj, you seem to be considering the star as a point object. If so, then u should also consider yourself as a pt. object........then it won't make a difference whether u move your finger or not. But, if not, since you are considering such a tiny movement as moving your finger, you should also consider the gaseous movements of the star (ie. flares, explosions on the star and stuff like that). Then, the Centre of mass is constantly changing isn't it? So, how can u consider a variable COM?
Kepler's Laws specified the path the planets were taking and defined it to be an elliptical one. Newton's law did not consider the ellipse and assumed orbits to be circular.Hence, it is called as an approximation to Kepler's Laws.
moving finger relates to change in entropy and change in COM both, but as pointed out by manoj and vibhavari, COM is not so accurate(and effective.).