The Man
Unbanned zombie poster
How? How do we measure gravity? I know we can measure a change, but what device measures the gravitational field?
We measure a charge by placing another charge of known value within the electromagnetic field of the unknown charge and measuring the resulting force, similarly we can measure the gravitational field of an unknown mass by placing an object of known mass (the gravitation equivalent of charge) within that gravitational field and measuring the force (or observing the motion in curved spacetime).



