Are we all going back to the essence?
This always makes me think about the Rakim joint, 'The Mystery (Who Is God?)'
Thoughts?
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YKhan say: The actual answer is not known yet, but our current best hypothesis is that gravity exists to balance out energy concentrations in the universe. If you look at energy like a fluid, then a fluid always wants to even out in its concentration over its entire volume. If you have a little bit of extra concentration of fluid in one part, then that means that there is less concentration in the areas immediately around it. So other things are going to want to come in to fill the void in the areas of low concentration.
Now, another thing we've found out over the past century is that matter and energy are really the same thing. Matter is just a very concentrated & trapped form of energy. So if matter is a concentrated form of energy, then the space around it has a lower concentration of energy. This creates a well which attracts other energy to come settle into it. Usually what this means is that matter starts attracting other matter to fill the void around it. But all matter develops its own low-energy void around it, so if matter attracts other matter, they just join and become an even bigger concentration of energy and they have an even bigger void to fill around their combined mass.
So basically gravity is the void or the energy well around matter, which creates an attraction by wanting to be filled.
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someg say: Another NASA scheme to keep every Tom, Dick and Harry going into space whenever they want to.
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a0w say: Yes, it exist on earth.
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Kevin7 say: It is a force of nature
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Lighting the Way to Reality say: Because Einstein said "Let there be gravity," and thus it was.
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Jim V say: Gravity is just part of the physics of the universe. The universe would not exist without it. We do not know what gravity /is/ - ontologically. But we do know that if the gravitational constant were different by more than 1x10^60 that the universe would not exist.