I believe gravitational waves have wavelength as large as a superheavy atom diameter and speed >2*10E10*c See Meta Research, Univ. of Maryland Physics, Army Research Lab at http://www.ldolphin.org/vanFlandern/gravityspeed.html That is why gravitational interaction exists from the very "beginning" and light pictures of the "Bing Bang" are still "coming" although we are "long" here.
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