I don't follow this. If the expansion was due to the curvatures in space time the matter should behave like it does in gravitational fields? That is, never exceed the speed of light, experience time dilation and so forth.
What I've heard in popular science is that the matter is almost stationary...
In popular science around 70% of the total energy in the universe is dark energy. I’m a little bit confused regarding what this energy does. Does it influence all matter with a pushing force to make the expansion of the universe accelerate or does it create new space time fabric?
I guess that...
Of course you can compare the forces but since the mechanisms behind the forces are completely different I don’t understand why we need an answer to why the gravitational force is so much weaker than the other fundamental forces. If the gravitational force were in the same order of magnitude as...
All physicists I've heard discussing gravity to the public always mentions that it's a very weak force compared to the other forces and that no one knows why. One possible reason could be that the gravitational force is propagating in other dimensions.
As far as I know gravity works in a...
What happens if two supermassive black holes pass each other so close that their event horizons briefly overlap each others? What will happen with matter and energy that is present in the overlapped region when the event horizons no longer overlap?