How can nothing expand? Isn’t space made of nothing? You can’t have 5 pounds of space.
In: Physics
You can’t have 5 pounds of lightning either.
Space is ***space***, it is not nothing. It is a thing. It is the medium in which things happen in existence.
Think about an Ocean. Water is the medium in which things happen in the ocean. That medium has properties, like mass, a volume and density. It has a boiling point, it will flow and fill the shape of the container it is in, those are properties of the medium, water.
The medium, space has properties as well but vastly different than anything you have encountered before. It has properties that allow it to expand and contract. Space can expand faster than the speed of light. Space can contract faster than the speed of light. You can have an infinite of amount of space in a single point. Mass bends space. Spinning mass twists space. Bends in space direct orbital path lines of light and other massive objects. These are properties of space.
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