How can two distant objects influence each other at a distance

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SUMMARY

The discussion centers on the nature of gravity and how two distant objects can influence each other in a vacuum. The most recent understanding emphasizes curved spacetime as the primary explanation for gravity, as outlined in the Einstein Field Equations, which are formulated using local differential equations, eliminating the need for action at a distance. For beginners seeking to grasp these concepts, the book "Relativity Simply Explained" by Gardner is recommended.

PREREQUISITES
  • Understanding of Einstein Field Equations
  • Basic knowledge of curved spacetime concepts
  • Familiarity with gravitational theories
  • Introduction to quantum gravity and gravitons
NEXT STEPS
  • Study the Einstein Field Equations in detail
  • Explore the concept of curved spacetime and its implications
  • Read "Relativity Simply Explained" by Gardner for foundational knowledge
  • Investigate the role of gravitons in quantum gravity theories
USEFUL FOR

Students of physics, educators, and anyone interested in understanding the fundamental principles of gravity and spacetime interactions.

NeilWallace
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I have trouble getting my head round gravity. How can two objects influence each other at a distance in a vacuum. I have heard of gravitons and spaced curved time as explanations of gravity and have never been able to get my head round these. Can anyone say what the most recent view is for the cause of gravity?
 
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A good book for beginners is Gardner, Relativity Simply Explained.
 
Curved spacetime is still the most recent view.

Is your concern with action at a distance? If so, then you should know that the Einstein Field Equations are expressed purely in terms of local differential equations. There is no need to suppose any action at a distance.
 

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