Question

what is galaxy. ..?

Hi
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Answer 1

Answer:

A galaxy is a huge collection of gas, dust, and billions of stars and their solar systems, all held together by gravity. We live on a planet called Earth that is part of our solar system. ... A galaxy is a huge collection of gas, dust, and billions of stars and their solar systems.

Answer 2

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Galaxies are sprawling systems of dust, gas, dark matter, and anywhere from a million to a trillion stars .