The reason matter is burning up is, due to friction and viscosity in a impure artificial vacuum. Newton said, "Instant", and Einstein said, "186,000 miles per second". If (EM) is instant, then (G) is too; however, instant (G) requires lots of (EM), and you need dense matter to pack the (EM) gravity punch. I, of course, do not need matter for my flying saucer; I only require energy. <img src="/images/icons/wink.gif" /> Oh, matter will move in an instant, but you need to either push the fabric in space-time (space-time ether), away as your moving, or remove the ether, as in a vacuum. Gravity will propagate faster naturally in very dense environments, but it does not require density. Light propagates faster in less dense environments, and forget the (S) and (W). Anode and cathode is all we need. <img src="/images/icons/laugh.gif" />