[ops33]

So are gravity waves produced by any object that has mass or just really large objects with lots of mass? Is it the movement of these objects through space that causes gravity waves?

[Svartalfiar]

Is it the movement of these objects through space that causes gravity waves?

Yes. If you watch the video, he gives a short explanation of a possible cause. TRT is only 3min, so it's not bad at all.