What is a "How Fast Is The Speed Of Gravity"? The Most Authoritative Explanation.

What is a "How Fast Is The Speed Of Gravity"? The Most Authoritative Explanation.

How fast is gravity?

Thanks to observations of gravitational waves, scientists were able to settle a longstanding debate over the speed of gravity. Throughout history, scientists have proposed many answers for the exact speed of gravity. Broadly speaking, the two main propositions have been that gravity is either infinitely fast or as fast as the speed of light.

How fast is gravity compared to light?

Kopeikin and Fomalont concluded that the speed of gravity is between 0.8 and 1.2 times the speed of light, which would be fully consistent with the theoretical prediction of general relativity that the speed of gravity is exactly the same as the speed of light.

Is the speed of gravity measured from time delays?

"The speed of gravity has not been measured from time delays". arXiv: astro-ph/0303346. Kopeikin, Sergei M. (2004). "The Speed of Gravity in General Relativity and Theoretical Interpretation of the Jovian Deflection Experiment". Classical and Quantum Gravity. 21 (13): 3251–3286. arXiv: gr-qc/0310059.

Why does the graviton travel at the speed of light?

But we do know almost certainly that there is also a particle associated with a quantized theory of gravity and that's called the graviton. So, in the same way that the photon carries the electromagnetic force, the graviton would carry gravity; and because we think the graviton is massless like the photon, it travels at the speed of light.

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