The speed of Gravity

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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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Re: The speed of Gravity

Postby Event Horizon on May 29th, 2018, 5:06 pm 

Ok, I found an article on this that I can understand:

https://www.forbes.com/sites/startswith ... f838666211

Although Einstein wins out over Newtons ideas, it does not seek to explain if gravity travels through dense objects at the same speed or not. The range, or reach of gravity may or may not be infinite too, and I dug this up..

https://www.reddit.com/r/askscience/com ... _infinite/

So it seems we are getting to grips much more with gravity than I thought.

So, do we have a unified gravity theory that works the same throughout the universe? It seems Einstein would say we can have some confidence that it does, but it's worth remembering we only detected gravitational waves a few years ago. It could be one day we may need "Gravitologists" to navigate space if we ever take to the stars.
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