The portion of the physical universe chosen for analysis, with everything outside the system known as the environment.
A physical system is often represented by a model, which is a conceptual system.
The Cosmic Scale is a demonstration of scope (at different scales) in the physical universe.Cultural Definition
(physics) The portion of the physical universe chosen for analysis, with everything outside the system known as the environment.
the portion of the physical universe chosen for analysis
Pattern Expression
All Entities in Physical Existence are part of physical systems.