Question

what is the universe​

Answer 1

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.

Explanation:

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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)

Average temperature: 2.72548 K (-270.4 °C or -454.8 °F)

Shape: Flat with a 0.4% margin of error

Size

about 93 billion light-years

The proper distance—the distance as would be measured at a specific time, including the present—between Earth and the edge of the observable universe is 46 billion light-years (14 billion parsecs), making the diameter of the observable universe about 93 billion light-years (28 billion parsecs).

Entropy

At the moment of the Big Bang, almost all of the entropy was due to radiation, and the total entropy of the Universe was S = 1088kB. On the other hand, if we calculate the entropy of the Universe today, it's about a quadrillion times as large: S = 10103kB.15-Apr-2017

entropy of the universe

Structure

The universe contains organized structures on all different scales, from small systems like the earth and our solar system, to galaxies that contain trillions of stars, and finally extremely large structures that contain billions of galaxies.

Dark ages

After the Big Bang, the Universe consisted of a cosmic soup of radiation and matter. About 400,000 years later, it entered an era known as the cosmic dark ages in which it was devoid of light. The first stars and galaxies began to emerge a few hundred million years later, and gradually provided the Universe with light.