What is the cause of gravitation? Is the field theory sufficient to answer its existence?

Answer 1

Surface Gravity is a more interesting facet of gravity. This is the gravity which keeps an atmosphere held to a planet. On Earth, the surface gravity is measured in Gauss, after the German scientist Carl Friedrich Gauss. 1 Tesla=10,000 gauss. On Earth, the surface gravity is 0.5 to 2.0 gauss. A Gaussmeter is used in measuring surface gravity. Why is this so important to understand?

In our Milky Way Galaxy there are 235 planetary bodies, of which 169 moons are in our Solar System. These 169 moons are the well documented satellite moons of the 9 planets. Jupiter alone has 63 moons. The challenge lies in how we can build atmospheres on them to support human life and all other living things. Also, we have to weed out the ones that are inhospitable.

Venus=0, Earth=1, Mars=2, Jupiter=63, Saturn=60, Uranus=27, Neptune=13, Pluto=3

The trick is to categorize them into planets/moons that either spin on their axis, or don't. Then, increase the surface gravity by inserting a Superconducting Magnet into the core. The magnet would range from 2 Tesla to 15 Tesla, depending on the amount of iron/nickel that is present in the core.

Finally, to introduce atmospheric gases into the man made electromagnetic bubble.

This website gives the exact location of each of the moons of Jupiter: http://www.ifa.hawaii.edu/~sheppard/satellites

and this site tells us how to make an ATMOSPHERE on all the moons: http://www.atmospheres.5u.com/index.html

Answer 2

Where there are forces acting remotely, physicists have concocted a thing called a field. Think of a field as simply a bunch of little force arrows distributed over time and space, but pointing in a specific orientation. Thus, we have EM force fields because we can describe a force F = kqQ/r^2 which is just the force between two electrical charge, q and Q that are r distance apart.

Similarly, we can say F = GmM/r^2 which is the force of gravity between two masses m and M that are r distance apart. As this force can be measured remotely from the sources of the force, there is a gravity field (of tiny little force vectors). So, sure, we can define the force of gravity as a field, but that just tells us what gravity does; it does not tell us what gravity is.

There are several theories; none of which has been proved. One theory says that gravity is simply the result of space being bent by the existance of mass. Unfortunately, there is an issue of cause and effect with this one. Did gravity cause space to bend (an observed effect by the way) or did bent space cause the effect we call gravity?

There is another theory (more a WAG) that posits the graviton. String/M theory suggest the graviton is a messenger particle that carries the attraction message from one mass to another. But, again, there is no scientific evidence that the graviton exists. And even if it does exist, there is no explanation how such a particle gives mass the come hither signal.

Answer 3

Einstein's field equations lead directly to the phenomenon of gravity, with mass being the cause of the gravitational force. Although still noted as a 'theory' of gravity, Einstein's equations are totally in accordance with observational research. Most significant are the earlier problems with the perihelion of the planet Mercury and their resolution via relativity, along with the observed bending of a light path passing near some large mass.

Exactly how mass distorts the spacetime continuum to cause that which we call gravity isn't understood. Once the theorized Higgs boson and the associated Higgs field are revealed science will have a more complete answer.

Answer 4

Gravity is caused when the fabric of space-time which is 4 dimensional (not to confuse 3d space and 1d is taken as time [it is time]) bends (due to mass) which causes objects nearby it to be attracted. It is similar to how a charged particle creates electric field around it. Not going into details, Einstein gave a better theory but Newton gave the better equation of the force. So you can take them from the respective places.

Theories are based on approximations, so if the approximations are correct, theories are too.

Answer 5

I think it is. But not everybody does. The graviton theory primarily exists because general relativity (which states that gravity is caused by the curvature of spacetime) and the standard model (which states that all forces are discrete) are incompatible.

But the cause of the 2 gauss read on the surface of the planet is because of the magnetic field, not because of gravity.

And making atmospheres on other planets/moons? Yeah, right.

Answer 6

It is not the goal of physics to explain ultimate causes, but to provide a framework in which measurements may be integrated into a predictive mathematical framework. There are fundamental inconsistencies between the current best theory of gravity (general relativity) and the current best theory of microscopic phenomena (quantum theory), so it only works on big things. They're working on it, though.

Answer 7

All massive bodies have an attraction to each other, even atoms are in this category. Einstein refined this attractive force as something different, he called it the curvature of space around a massive body, this has been proved correct, but Newton's laws are good enough for most purposes.

Answer 8

the cause gravitation is the presence of iron and nickle in the core of the earth.

Answer 9

....The origin or "cause" of gravity is still unresolved ....we only have equations that describe what we observe.