Spacetime of Fluid and Gas

The spacetime coordinates do not measure the spacetime. It measures a structure of the object. The structure is massenergy center and spacetime around. It is build up by massenergy and spacetime together. The density of massenergy of solid is bigger than the one of the fluid or gas; contrariwise, the density of spacetime of the fluid or gas is bigger than the one of the solid. Because the density of spacetime is inversely proportional to the density of massenergy. The Einstein's equation has the other formula for the structure of the center of spacetime. The spacetime is wave, and the spacetime effect of the fluid and gas are about buoyancy, pressure, resistance, and temperature will be taken into Einstein's equation. It should explain of the low density asteroid-1950 DA and a rock hull of 67P/Churyumov-Gerasimenko. http://meetings.aps.org/link/BAPS.2015.APR.T1.24 http://meetings.aps.org/link/BAPS.2015.APR.H14.8