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David Brill
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Does it make sense to think of our universe as a "container" of matter and energy? If so, is there some minimal content?
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David Brill said:Does it make sense to think of our universe as a "container" of matter and energy?
I always think of it as just a metric. Things have varying distances from each other and the measure of those distance is the metric of space. They change distances from each other and that is one way to formulate a metric of time. "Container" is just too loaded a word, as others have already pointed out.David Brill said:Does it make sense to think of our universe as a "container" of matter and energy? If so, is there some minimal content?
Spacetime is a concept in physics that combines the three dimensions of space (length, width, and height) with the dimension of time. It is often depicted as a 4-dimensional grid or fabric that describes the physical universe.
This is a debated topic among scientists. Some argue that spacetime is not a physical container, but rather a mathematical construct used to describe the relationships between objects in the universe. Others believe that spacetime can be thought of as a container, as it contains all matter and energy in the universe.
According to Einstein's theory of general relativity, objects with mass create curves in the fabric of spacetime. The greater the mass of an object, the greater the curvature of spacetime around it. This affects how objects move and interact with each other.
As far as we know, spacetime cannot be directly manipulated. However, the effects of spacetime can be manipulated through the use of gravity and other forces. For example, we can manipulate the trajectory of a spacecraft by using the gravitational pull of planets.
In Einstein's theory of general relativity, gravity is not a force between masses, but rather a curvature of spacetime caused by the presence of mass and energy. This means that spacetime and gravity are intimately connected and cannot be separated from each other.