Question

What is universe and galaxy?​

Answer 1

Answer:

all existing matter and space considered as a whole; the cosmos. The universe is believed to be at least 10 billion light years in diameter and contains a vast number of galaxies; it has been expanding since its creation in the Big Bang about 13 billion years ago.

Explanation:

A galaxy is a gravitationally bound system of stars, stellar remnants, interstellar gas, dust, and dark matter. The word galaxy is derived from the Greek galaxias, literally "milky", a reference to the Milky Way. 

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Answer 2

Universe refers to the world of earth or world of all planets . Galaxy refers to star,planets, meteoroids,moons etc

Universe is a part of galaxy but not a galaxy.

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