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Re:Physicists identify the engine powering black hole energy... by tacticalmook on Thursday May 20, 2021 @09:51PM (#27229667)
Gravity does not travel at the speed of light. Some speculate that instant (ie: faster than light) communication could be possible by manipulating gravity.
Re:Physicists identify the engine powering black hole energy... by krapp on Thursday May 20, 2021 @10:02PM (#27229726)
Gravity does travel at the speed of light. This is required by general relativity and was confirmed by observation multiple times[0,1].

[0]https://en.wikipedia.org/wiki/Speed_of_gravity

[1]https://www.forbes.com/sites/startswithabang/2019/07/06/ask-...

Re:Physicists identify the engine powering black hole energy... by Diggsey on Thursday May 20, 2021 @10:02PM (#27229729)
Not sure where you got that idea. The effect of gravity does travel at the speed of light (this is why gravitational waves exist).

https://en.wikipedia.org/wiki/Speed_of_gravity