In a previous post, we defended the Machian solution to the Twin Paradox of measuring accelerations relative to the mass distribution at large of the universe. We revise such claims, study the true cause of time dilation and the Twin Paradox in curved spacetime, and briefly introduce the flowing space interpretation of General Relativity.
The Machian solution to the Twin Paradox (2) Read More »
There are substantial indications that point towards the gravitational constant no being a universal constant, but a derived parameter and a variable in a more fundamental theory of gravity. We explore how the gravitational constant introduces a preferred scale in gravitation, the approaches to remove it, and its possible uses to solve unexplained observations.
Newton’s gravitational constant is not fundamental Read More »
The origin and physical mechanism of Modified Newtonian Dynamics (MOND) is unknown. We derive the acceleration scale constant a0 and MOND’s interpolating function from a linear approximation to General Relativity which implements Mach’s principle and the relativity of acceleration, in a modified inertia model. This proof of concept motivates the possibility that MOND arises from large-scale linear inertial frame-dragging induced by the expanding universe within General Relativity.
Is MOND an an effect of cosmic frame-dragging à la Mach? Read More »
Erik Verlinde’s entropic gravity was claimed to explain dark matter in galaxy rotation curves as a modification to gravity similar to Modified Newtonian Dynamics MOND. But does it really work as good as MOND? Has Verlinde truly derived MOND and its acceleration scale constant from first principles?
Verlinde’s Entropic Gravity and Dark Matter Read More »