Reversed Gravity: Antigravity Effects on Spacetime

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Discussion Overview

The discussion revolves around the hypothetical scenario of reversing gravity to become a repulsive force and its implications for spacetime. Participants explore the effects of such a change on matter, planetary structures, and the overall universe, considering both theoretical and conceptual aspects.

Discussion Character

  • Exploratory, Conceptual clarification, Debate/contested

Main Points Raised

  • Some participants question the consequences of making all gravity in the universe repulsive, pondering how this would affect spacetime and whether everything would remain the same.
  • One participant suggests that if gravity were repulsive, all matter would fly apart, particularly on planetary and larger scales, while smaller scales might be less affected due to electromagnetic forces.
  • Another participant notes that while bodies might not disintegrate, the lack of gravitational pull would result in humans being thrown away from the planet.
  • There is a suggestion that a simulation of a planet or star experiencing reversed gravity would be interesting to observe.
  • Some participants discuss whether the effects of reversed gravity would be similar to simply removing gravity, with one stating that repulsive gravity would cause objects to fly apart more rapidly.
  • It is mentioned that planets would likely explode under both scenarios due to the release of compression, leading to a lack of atmosphere and air for life.

Areas of Agreement / Disagreement

Participants express differing views on the specifics of how reversed gravity would function and its effects, indicating that the discussion remains unresolved with multiple competing perspectives.

Contextual Notes

Participants do not fully explore the underlying assumptions of their claims, and there are unresolved questions regarding the nature of gravity and its effects on matter at different scales.

abuguchie
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I've seen several posts on antigravity and theories on whether it can or cannot be a repulsive force as well as an attractive one.
My question is, what would happen if all gravity in the Universe was somehow made repulsive?how would that affect spacetime? Would everything remain exactly the same?
 
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abuguchie said:
My question is, what would happen if all gravity in the Universe was somehow made repulsive?how would that affect spacetime? Would everything remain exactly the same?
Well, all matter would fly apart...
 
FtlIsAwesome said:
Well, all matter would fly apart...

Well, not exactly. On a smaller scale, like with humans, you probably wouldn't notice I suspect as the electromagnetic force keeps things together. On planetary and higher scales, however, things would definitely fly apart immediately. Our bodies wouldn't fly apart themselves but ... well, the planet would send us flying away!
 
We'd die from lack of atmosphere. :eek:


It'd be interesting to see a simulation of a planet blowing up due to reversed gravity. :cool:
Or a star. Or... etc etc.
 
Would it have the same effect as simply taking the gravity away?
 
abuguchie said:
Would it have the same effect as simply taking the gravity away?
Similar, but not quite. With repulsive gravity objects will fly apart much faster.
Planets would probably still explode if there was no gravity instead of reversed gravity. Because they are under a lot of compression and once that compression is released they'll fly apart.
In both situations we'd die from lack of air.
 

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