Quote:
Originally Posted by north
Jim I think that the object agitates the clouds by , not through gravity , but by fluid dynamics , swirls of matter drawn to the object as it passes through the cloud
what do you think ! I can picture it
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The difference is that this object doesn't touch the matter and it acts on the matter only through the curvature of sacetime (which is the same as "gravitational ineraction"). A photon agitates a cloud of galaxies traveling through them not touching any one of them since otherwise we wouldn't see the photon (it would be absorbed).