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**Physics, Astronomy & Cosmology / Re: Did Einstein "kick the can" on gravity?**

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**Yesterday**at 01:50:20 »

As Alan says the field is a mathematical abstraction. What you do is place a test mass (1kg) and measure the force vector acting on that mass, that vector is the field strength (unit gravitational force) at that point (you can do the same with a magnetic field, using a test magnet). In this case you create a map of of gravitational force values for a volume of space.Is that the famous Einstein Field Equation I have heard of?

That’s all a field is. The value of it is that with gravity we can usea simple formulato calculate the field strength at any point between 2 masses, and hence the force between 2 masses.

(if it is I am glad to learn it is simple )