Newton's Gravity vs. Einstein's Gravity
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Newton's Gravity vs. Einstein's Gravity

[From: ] [author: ] [Date: 11-05-27] [Hit: ]
Also, if the gravitating body moves, the effect on gravity elsewhere is instantaneous. Einsteins theory is mathematically more complicated. Time and distance intervals depend on ones frame of reference, gravity propagates at the speed of light,......
I'm not asking for who's wrong or who's right, I'm just hoping to get a comparison :) Please tell me the difference, I don't mind lots of detail, in fact it's appreciated :)

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The differences mainly result from the different way space and time behave in the theories. Newton's gravity assumes Newtonian mechanics and the inverse square law of force. Time intervals between events and the distance between objects at a given time are the same for all observers. Also, space is Euclidian, meaning that the Pythagorean Theorem works for right triangles drawn in space. Also, if the gravitating body moves, the effect on gravity elsewhere is instantaneous. Einstein's theory is mathematically more complicated. Time and distance intervals depend on one's frame of reference, gravity propagates at the speed of light, and Euclidean right triangles cannot be represented by paths through space.

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Newton ignored what gravity was and just figured out what it did

Einstein tried to figure out what gravity is.

In the case of low masses and weak gravity fields, Einstein and Newton almost agree. The difference shows up in strong gravity fields like black holes.

The math for Newton is much easier and good enough for NASA to use Newton to calculate the path of spacecraft. Einstein is not worth the extra computer time
E

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Well, both theories were written in different time periods, Newton's first. Einstein and Newton both studied the theory hard, so really it could be eiter who is right. What you could do is do some comparisons yourself.
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