The speed of Gravity

Discussions on classical and modern physics, quantum mechanics, particle physics, thermodynamics, general and special relativity, etc.

The speed of Gravity

Postby Event Horizon on May 15th, 2018, 5:14 pm 

I was wondering how fast does gravity propagate through spacetime. I assume it propagates at lightspeed, but assumptions are dangerous things sometimes. Presumably we can calculate this from great celestial events like binary stars or black holes colliding. And I guess a follow-up question would be, does gravity always propagate at the same speed? Through matter vs through the vacuum of space for instance. Do we know this yet?
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