Question

What is Galaxy.....?​

Answer 1

Answer:

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.

Answer 2

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galaxies are the fundamental units of structure in the universe where stars form. Theory currently holds that all galaxies are confined by the gravity of the dark matter halos that permeate and surround them, but there is recent evidence that some galaxies may be dark-matter-free.