If gravity were to suddenly increase significantly in every part of the universe except for one point, and then return to normal everywhere else, it would have profound effects on the structure and dynamics of the universe. Here's a general description of what might happen:
Increased gravitational force: With the sudden increase in gravity, objects throughout the universe would experience a much stronger gravitational pull towards each other. Galaxies, stars, planets, and other celestial bodies would be affected by this increased force.
Structural changes: The increased gravity would cause compression and collapse of celestial objects. Stars could become denser, and their cores could undergo further nuclear reactions, potentially leading to supernovae or other stellar events. Planets and moons would also experience increased compression, which could lead to changes in their size, shape, and internal structure.
Disruption of orbits: Orbits of celestial objects, such as planets around stars or moons around planets, would be significantly altered. The increased gravity would pull these objects closer to their central bodies, potentially leading to destabilized orbits, collisions, or ejections from their original systems.
Effects on light: The increased gravity would cause light to bend more severely, leading to changes in the paths of light rays. This could affect how we observe and perceive distant objects in the universe.
Regarding the one point where gravity remains normal, it would experience a stark contrast compared to the rest of the universe. Objects near this point would continue to behave according to the previous gravitational regime, while everything else would experience the heightened gravity.
It's important to note that this scenario describes a significant and sudden change in the fundamental laws of physics, which is purely speculative and not supported by current scientific understanding. It is difficult to predict the exact consequences accurately, as our understanding of the universe's behavior under such extreme conditions is limited.