Where is the proof that all objects with mass in the universe have a gravitational pull on all other objects?

Question

My understanding is that this is a law of physics. Which scientists did the work on this law? How were they able to prove this? Any help would be greatly apprecitated!

Answer 1

This is the Law of Universal Gravitation started by Newton andit is :

F = G * m1 * m2 / R^2

G is Gravitational constant I forget the actual value but not too hard to find something very small 10^-11 or something
m1 is the mass of object 1 m2 is mass of object 2
r is the distance between them

Therefore any massive objects exerts a force on another massive object, however if you take the masses of small objects this force will be extremely small due to G.

They were able to prove this by looking at celestial trajectories and also at a smaller scale using sensitive apparatus to measure the smaller side of the spectrum.

Answer 2

Isaac Newton formulated the law of Universal Gravitation and demonstrated its validity by showing how it could explain the orbits of the moon and the planets. Albert Einstein's theory of General Relativity explained the workings of gravity as a warping of space-time, rather than a remotely-acting force.

There are a few scientists today who think that Newton's inverse square law (F = GMm/r^2) is merely an approximation, and that a more complex form of the equation is needed to describe the action of gravity over distances on the scale of a galaxy. They have proposed this as an alternative to dark matter to explain the dynamics of galaxies.

Answer 3

Isaac Newton was the first to publish a universal theory of gravitation. While there is no "proof" per se in science, his hypotheses and theories have been borne out by close to three centuries of observation and analysis.

Answer 4

It was indeed Sir Isaac Newton who formulated the law of universal gravitation. But, of course, nobody knows if it is true for every object in the universe, because nobody has examined every object in the universe.

Answer 5

Laws can't be proven. They can only be accepted. It is a basic assumption.

It's like in real number theory you state that a+b=b+a. You can't prove it. It is an assumed truth, i.e., a law.

Answer 6

I'm guessing Newton, but I don't remember because it's been a while.

Answer 7

http://www.goodbyemag.com/jul01/hoyle.html

http://www.pbs.org/wnet/hawking/strange/html/gravity.html

http://en.wikipedia.org/wiki/Hubble's_law

http://nobelprize.org/nobel_prizes/physics/laureates/1983/chandrasekhar-autobio.html

http://www.kolmogorov.com/FeynmanFLG.html