The universe is all of space and time and their contents. It comprises all of existence, any fundamental interaction, physical process and physical constant, and therefore all forms of energy and matter, and the structures … See more

The prevailing model for the evolution of the universe is the Big Bang theory. The Big Bang model states that the earliest state of the universe … See more

The universe is composed almost completely of dark energy, dark matter, and ordinary matter. Other contents are electromagnetic … See more

The physical universe is defined as all of space and time (collectively referred to as spacetime) and their contents. Such contents comprise … See more

The word universe derives from the Old French word univers, which in turn derives from the Latin word universus, meaning 'combined into one'. The Latin word 'universum' was … See more

Of the four fundamental interactions, gravitation is the dominant at astronomical length scales. Gravity's effects are cumulative; by … See more

Model of the universe based on general relativity
General relativity is the geometric theory of gravitation published … See more