Can gravity be absent? Can gravity be absent? Not weightlessness as an astronaut experiences it because the astronaut's body still has gravity which will probably manifest in the presence of another smaller/larger body. For instance, given the mass of the moon it is subject to Earth's gravity holding it in orbit. I mean, total absence of gravity; can it happen?
I think this question will need to be edited; reading it seems even more muddled than the thought ... I can't express it. Feel free to vote to close/delete
 A: Since every object creates a gravitational field, the only way that there can be space with no gravity whatsoever is if you have no objects whatsoever.  Even light will create a (generally very small) gravitational field.
A: Absolute absence of a gravitational field in a region of space is plainly impossible, since in the universe there's at least one particle with mass which generates an infinite-reaching field (and in fact, there's obviously a lot of stuff out there, from planets to stars to galactic filaments). The gravitational force is the weakest of the fundamental interactions of Nature, and as the electromagnetic force, it has an infinite range; but unlike the latter, there's no "negative mass" equivalent which can "neutralize" the field far away from the interacting bodies.
That's why, among other things, that there's no macroscopic manifestation of the astronomically strong electric field that would be generated if all the elementary charges of electrons and protons, which compose every atom in any everyday object, were turned apart and separated. On the other hand, the gravitational force shapes the entire universe at the cosmological scale, and the electromagnetic interaction has no significant effect on large (neutral) objects like planets and stars.
A: Yes, it could be possible to have a system without gravity. You've probably heard of the phenomenon called Dark Energy. This describes the accelerating expansion of the universe. There are theories that believe that this acceleration is not limited by the universal speed of light. The transfer of gravitational information is however thought to be limited by the speed of light. This means that if the space between the masses is spreading out faster than the information can be transferred, the masses will not interact with each other. In this senario it would be possible for there to be an absence of outside gravity. If you're interested in this concept you should look into the theories of Dark Energy and the Big Rip. 
Hope this helped, and hope I got most of it right!
