The speed of gravity not only equals the speed of light to an incredibly precise degree observationally, but these two constants must be exactly equal theoretically, or General Relativity would ...

It may surprise you to learn that the speed of gravity is something of an ongoing debate among many cosmologists today. The textbook answer to the question “what is the speed of gravity?” ...

More inspiral and merger of binary black holes provided humanity with our first direct measurement of gravitational waves, and with it, our first direct measurement of the speed of gravity.

We reported in September astronomers were preparing to measure the speed of gravity, and the results are in. The measured value for the speed of gravity was determined to be 95% the speed of light ...

Over the decades, physicists have compiled various lists of the most important fundamental constants. Generally, there are a ...

The speed of gravity has been measured for the first time. The landmark experiment shows that it travels at the speed of light, meaning that Einstein’s general theory of relativity has passed ...

Wide binary stars with separation greater than about 2000 astronomical units are interesting natural laboratories that allow ...

In general relativity, gravity travels at the speed of light instead of instantaneously. Once relativistic effects are accounted for, general relativity also accurately predicts the orbits of ...