Global spacetime structure

Global spacetime structure refers to the way that time and space are connected throughout the entire universe.

Imagine you are in a big playground, and you want to play hide and seek with your friends. You can run around and hide behind different things, but eventually, the playground is limited, and you will find all your friends. The universe is similar but much bigger, and instead of a playground, we have space and time. The way that space and time are connected throughout the entire universe is called global spacetime structure.

One important thing to understand is that space and time are not separate things in the universe; they are connected. Just like your hiding spot in the playground is connected to the time you spent hiding there, the position of an object in the universe is connected to its time.

Another important thing to know is that the way that space and time are connected is not the same everywhere in the universe. It can be influenced by the way that matter and energy are distributed, and the curvature of space. Just like some parts of the playground may have more obstacles than others, some regions of the universe may have more matter, energy, or curvature that can affect global spacetime structure.

So, in summary, the global spacetime structure is the way that space and time are connected throughout the entire universe, and it can be influenced by the distribution of matter, energy, and the curvature of space.