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 ...

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

In Newtonian physics, gravity was thought to be instantaneous. But in Albert Einstein’s general theory of relativity, the speed of light, c, is the fastest possible speed for any interaction ...

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 ...

You can calculate it by taking the square root of the reduced Planck constant times the speed of light divided by Newton's G. That mass is around 10^-8 kilograms. If gravity were strong — if ...

In space, speed matters. The closer an object is to the Sun the faster it must be moving to maintain a stable orbit. That’s even more important to planets closer to the Sun, because those planets are ...

Gravity can turn itself into light ... However, the team found that if the early universe contained enough matter that the speed of light was reduced (the same way light travels more slowly ...

If you step on a scale, the weight you are measuring is actually your acceleration due to gravity. This measurement stays the same regardless of the speed at which the Earth is moving through the ...