Question

what is universe?????​

Answer 1

The universe is all of space and time and their contents, including planets, stars, galaxies, and all other forms of matter and energy.

Answer 2

Answer:

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. Wikipedia

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)