I don't know a lot about the topic so I thought we could explain it and discuss it. A lot of people don't know that in addition to sound waves and light waves, gravity is also a wave itself. It's just a very weak wave. We also know this is true because of black holes' effect on light. It appears as though there are two identical bodies in space when in reality we are looking at a black hole that is bending the light of an object around us to appear as two objects when it reaches us. Black holes are obviously much more dense than objects such as Earth. But Earth has gravity too and also has an effect on light. That's what the discussion is about. Also the force of electricity and the force of gravity equations are so similar but there still hasn't been a link found between the two yet. Here they are.
Things in parentheses are subscripts
F(electricity) = K(c)[q(1)q(2)]/d^2
F(gravitational) = G[m(1)m(2)]/d^2