Gravity Bend

  • #1
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Dear PF Forum,

I realize that there are 4 basic forces in our universe.
Two of them are gravity and electromagnetic force.
Gravity curvature.jpg

Electromagnetic travels at the speed of light.
And it seems that Gravity travels/propagates at the speed of light also.

Light is bent by gravity. What about gravity?
Is gravity bent by gravity?
In the picture above. Planet C will see star A1 as in position A2.
What about the gravity? Does C orbit the barycentre of A2-B-C, or the barycenter of A1-B-C?

Thanks
 

Answers and Replies

  • #2
25
5
If you think about this, you will see that theres only one object and its real position is ##A_1## but as we know light path will change according to gravity of B planet. So we will see ##A_1## in ##A_2##.Thats doesnt mean gravity bent.Only light bent and we different place the object so the answer will be ##A_1## B C.Objects move according to space time curvature.If you think real ##A_1## is in ##A_2## that causes different curvature and movement.
 
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  • #3
A.T.
Science Advisor
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What about the gravity? Does C orbit the barycentre of A2-B-C, or the barycenter of A1-B-C?
I don't think gravity is deflected this way, but gravitational waves might be.
 
Last edited:
  • #4
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Given that the reason for light being bent is because they follow the geodesic of a distorted spacetime, I would think gravity waves would do the same. It would strike me as peculiar if they somehow traveled through spacetime in a special manner independent of the distortion.
 

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