# Gravity Bend

Dear PF Forum,

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

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

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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.

Stephanus
A.T.