Define Universe??????
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The universe is all of space and time and their contents, including planets, stars, galaxies, and all other forms of matter and energy. The Big Bang theory is the prevailing cosmological description of the development of the universe.
Mass (ordinary matter): At least 1053 kg
Main contents: Ordinary (baryonic) matter (4.9%); Dark matter (26.8%); Dark energy (68.3%)
Age (within Lambda-CDM model): 13.799 ± 0.021 billion years
Diameter: Unknown. Diameter of the observable universe: 8.8×1026 m (28.5 Gpc or 93 Gly)
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