Based on current evidence and models, visible, luminous matter (such as the stars within galaxies) amounts to approximately less than 1 percent of the total mass and energy of the universe.
What is called a universe?
The phrase "the totality of existence," which refers to all that is, all that has been, and all that will be, is frequently used to describe the cosmos. Some scientists and philosophers are in favor of defining the cosmos in terms of ideas and abstract notions, such as logic and mathematics.
What is the total mass-energy of the universe?
One can demonstrate how this negative gravitational energy precisely cancels the positive energy represented by matter in the case of a universe with roughly uniform space. As a result, there is no energy in the universe.
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