Is Gravity Capable of Repulsive Forces?

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SUMMARY

The discussion centers on the concept of gravity potentially exhibiting repulsive forces, contrasting it with electromagnetic forces that have both positive and negative charges. Participants reference the failed attempts to locate dark matter, questioning the validity of dark matter theories. The idea is proposed that the observed expansion of the universe could be attributed to a repulsive aspect of gravity, although this raises challenges for the existence of "opposite charged gravitons." The conversation highlights the complexities of cosmological observations and the nature of gravity.

PREREQUISITES
  • Understanding of gravitational theory and its implications in cosmology
  • Familiarity with dark matter and dark energy concepts
  • Basic knowledge of particle physics, specifically gravitons
  • Awareness of the accelerated expansion of the universe
NEXT STEPS
  • Research the implications of dark energy on cosmic expansion
  • Study the properties and theories surrounding gravitons
  • Explore alternative theories to dark matter in cosmology
  • Investigate the role of repulsive forces in gravitational theories
USEFUL FOR

Physicists, cosmologists, and anyone interested in advanced theories of gravity and the universe's expansion dynamics.

Yohan_Borga
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Greetings,

When I was still in college, a professor commented that it was possible that gravity was not a force. He based this on the observation that gravity didn’t seem to have opposite charges. The force of electricity has positive and negative. Gravity does not seem to have such attractive and repulsive properties.
In shashdot, a story titled “Missing Matter… Still Missing” has appeared. It seems that the latest attempt to locate dark matter failed. This doesn’t surprise me because I’ve always had a problem with the theory of “dark” matter and energy. It just doesn’t seem right.
I am wondering if what we observe in cosmology could be the result of gravity’s “opposite” charge of repulsion. Could the vast voids and expansion be accounted for by the repulsive charge of gravity? I’m not a physicist or cosmologist but I am hoping the learned community may speculate on this possibility. How about it folks?

:confused:
 
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Whatever is causing the accelerated expansion of the universe does act somewhat like gravitic repulsion, but it is not associated with matter, but rather distributed through empty space. This would make problems for a theory of an "opposite charged graviton" I think.
 
selfAdjoint said:
Whatever is causing the accelerated expansion of the universe does act somewhat like gravitic repulsion, but it is not associated with matter, but rather distributed through empty space. This would make problems for a theory of an "opposite charged graviton" I think.

If opposite charged gravitons exist, how would matter come together?
 

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