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Message: <blockquote data-quote="Umbran" data-source="post: 6822956" data-attributes="member: 177">In the sense that *everything* interacts with gravity, yes.  You can think of it less as "these ripples interact with..." so much as "these ripples change the shape of the universe that these things move in".  As for how much energy there is in gravitational waves floating around out there - there's a sort of upper bound.  We have detectors.  They do see some noise, but not huge amounts.  We can see an (admittedly powerful) event from a billion light years away.  That means there's not all that much "static" out there.  Variations in distances we from such waves are *tiny*.  Like, fractions of the diameter of a proton, kind of tiny.We are not tossed on a stormy gravitational sea.  We are in gravitational doldrums, glassy flat.</blockquote>