Matter or gravity exists first? Did matter and gravity ever separate? Gravity is the most accurate measured fundamental force in the labs between lead balls. Gravity is internal property of the mass. It is simultaneously coexisting with masses. It has no speed, it is always there attracting Masses in space. Gravity does not move, only mass can move. stop and think, don't deny facts, all planets have stable orbit, gravity had to be instantaneous continuing force.

Two masses attract each other at any distance, gravity is constantly attracting masses, is always and forever there coexisting with masses. How can force move at any speed? Force is invisible connection between matters. It has no speed. Force propagating in matters will produce matter waves. Earthquake is real gravity waves.

All waves are matter waves, space cannot carry any waves. EM waves propagate in space at light speed is mistake, photons move in space at light speed is mistake. There is no such thing as photon particle existing. Scientists today still don't know what is light, what is energy, how atom is formed.