Question

5. A system of millions of stars held together by gravity
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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. ... It's a small part of the Milky Way Galaxy. A galaxy is a huge collection of gas, dust, and billions of stars and their solar systems. A galaxy is held together by gravity.

Answer 2

Explanation:

GALAXY - A large collection of stars, dust, and gas in space. A system of millions or billions of stars held together by gravity. Examples include our own Milky Way.