Question

what is univers? ? ? ? ? ? ? ? ? ? ? ​

Answer 1

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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.

Answer 2

Answer:

Period is referred to as a cycle ( length of full cycle), where as periodicity is measure of a function's period. Periodicity is a tendency for a function to repeat itself at determined intervals in a regular pattern.