What creates gravity
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What creates gravity

[From: ] [author: ] [Date: 11-07-09] [Hit: ]
Several decades later, this idea was extended to 10 or 11 dimensions, all but the familiar 4 of spacetime being compactified, to become modern String Theory.Anyway, after some of the most formidable mathematics ever dreamed of by the mind of man,......
G[µν] =8πT[µν]

And by positing a fifth, compactified ("rolled-up" submicroscopically beyond any direct detection) dimension of spacetime, Theodor Kaluza was able, in 1919, to show that electromagnetism could be similarly explained geometrically. Several decades later, this idea was extended to 10 or 11 dimensions, all but the familiar 4 of spacetime being compactified, to become modern String Theory.

Anyway, after some of the most formidable mathematics ever dreamed of by the mind of man, most of which has yet to be tamed enough to make any actual predictions from the theory, this is about as close as anyone has come to "explaining" what gravity, or the other physical forces, actually are. Among top theoretical physicists, the jury is still out on whether this is the greatest discovery since Galileo disproved Aristotle's laws of physics (arrived at by pure thought), or whether the whole idea is all wet.

I guess in that sense, your question is in my 2nd category from the opening -- clever, probing, and heart-of-the-matter.

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Sorry if I kind of data-dumped on you, but don't ever think of yourself as stupid. You realize your own ignorance (no one who doesn't, can ever really learn anything new!), you're curious enough to pursue the answers, and that combination puts you ahead of 99.9% of the human population.

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BTW, all of us are ignorant of lots of things. The truly smart ones are those who realize it, and know how to remedy it.

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In a word, MASS! Any object has mass, just like it has weight. (The two are related). The Earth has a lot of mass, the Sun has more mass. There is an invisible force between these two objects, and the masses attract each other because of this invisible attraction called gravity.
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