Today I was thinking about the possibility that there could exist a place (or point) in spacetime where [STRIKE]no effects of gravity are felt[/STRIKE] gravitational fields cannot be detected (edited for clarification). Most of the thoughts I've had say this is impossible.(adsbygoogle = window.adsbygoogle || []).push({});

Here are my ideas:

No, it's impossible:

- Since gravity is an effect on spacetime and its effects are extremely far-reaching, perhaps the spacetime is itself simply a byproduct of gravity, in which case without any gravity there is no spacetime.
- Perhaps dark matter is imparting the gravitational force that makes up the underlying blanket of spacetime, and this could have existed before the big bang (in the case that it's real matter in another universe), meaning there could be gravity far past the expansion point of spacetime. Similarly, if the universe in our dimension is infinite, it probably loops back on itself, in which case there is no "end", or place in spacetime where it's unlikely that any particle has reached or will reach with any frequency.
- If no gravity exists in the place, than how can you even quantify space, or time, so perhaps this question is irrational.

Yes, it's possible:

- If gravity has a force-carrier particle (graviton), then perhaps this question is the same as "is there a place in spacetime where no light (well, photons/EM radiation really) is/are detectable from mass-bearing objects?". With this reasoning, I would think that if you travel far enough, you could get to a place where it's improbable that any graviton would hit you in a reasonable amount of time (say, one day).

Btw, the thing that got me thinking about this is the discovery that the our galaxy is likely to collide with Andromeda, meaning the gravity is strong enough in "empty space" to pull two galaxies together across over 2 million light years in 4 billion years, which I'd say is pretty incredible!

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# Can there be a place in space where no gravity exists?

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