What is Gravity, how does it come about.

What are you curious about? What causes gravity? What effects does gravity have on matter, space and time? Also, why do you assume both time and space are memerly constructs? ( I assume by this you are suggesting that they aren't real, but human constructs. It really isn't clear what you are asking.) Without a contructive premise or question, this isn't much of a discussion.

Actually, gravity as a function of curved space due to mass is what realitivity is all about, and isn't speculation.
The big question about gravity is why it works. Between Newton, Einstien, Wheeler, etc, there has been lots of work on the affects of gravity. However, while gravity is proposed as a curvuture in space, we aren't sure why it is curved by mass. Additionaly, the biggest rift between QM and realitivity is that there isn't a quantum desription of gravity. The other three major forces are all interrelated, and have corresponding force particles. Gravity is the mystery. Part of the problem is that gravity is an extremely weak force. It makes it nearly impossible to do experiments in a lab to explore gravity on the quantum level.
This is one of the topics of science that fascinates me. While YEC rail against evolution as a theory they can discount, the readily accept gravity as a given. However, the how and why of evolutionary theory is better understood than gravitational theory.[This message has been edited by Darwin Storm, 03-30-2004]

V-bird, have you ever taken a basic physics course? Gravity is by far the weakest force, and is easy to demonstrate as such. Consider teh fact that the repulsive force between atoms is enought to support the entire mass of the earth easily. That means that the electromagnetic force of individual atoms at the center of the earth is more than sufficient to support all the mass above it.
If you calulate the comparitve disparity of the two forces, the electromagnetic force is some 10^32 time greater than the force of gravity. However, this are both positive and negative charges, so overall, the net effect is zero when looking at larger bodies of matter. Conversely, the reason why gravity has such a large effect cosmic scales is that it doesn't have a counter-acting force. Gravity appears to be attractive in all directions.
As for curved space, it has been verified by numerous experiments. Gravitational lensing is a consequence of this. Additionally, if gravity didn't curve space, then other observed phenomena of general realitivity wouldn't have had positive results. I suggest that you do some reading on the subject before making wild claims. If, on the other hand, you have evidence to support your assertions, please feel free to post it.

Imagine space as two-dimensional.If space is flat, any linear motions will be seen as linear motion, and there observable consequences. The axioms of euclidian geometry are dependant on flat space. However, if you bend the 2-d space, you change the properties of the two dimensional space. For example, in flat 2-d space, the angles of triangle add up to 180 degrees. However, if you were to curve the 2-d space, this is no longer true. If you curve the plane into a sphere, or at least in that direction, the result is that the angles of a triangle add up to more than 180 degrees. You can also bend the sheet in a open saddle geometry,the angles add up to less than 180 degrees. In both of these cases, the shortest distance is no longer a straight line, but a curve. The same idea is translated to 3d space. Light follows the curved path of a gravity well because that is the shortest distance.

Would a list of physicists specializing in gravtional theories be better? I know people like Einstien, Wheeler, and Hawkings, who spent their lives researching this field this might not be enough. So feel free to contact the thousands of other physicists who work in this field. Or speak with numerous astronomers and cosmologists who deal with gravitional theories and how it affects large scale structures in our universe.

V-bird, I have a question. Have ever taken a phsyics course? You have said things that would make any physics student laugh. The gravitional force of the earth acting on a body at its surface is the same for all bodies, regardless of its motion. (given that it small, like people, mountains, ect. Large bodies. ie moons and planets, would cause a different acceleration between teh two bodies). It doesn't matter if you are "at rest" or moving, the acceleration of gravity is the same, unless you are increasing the distance between the two bodies. Also, the principles of motion, until you approach the speed of light, are cleary described by newtonian mechanics. The motions are predictable, and work regardless of the type of force applied.