What are galaxies, and how do they differ from other deep sky objects?
What are galaxies, and how do they differ from other deep sky objects?

What are galaxies, and how do they differ from other deep sky objects?

Galaxies are vast systems of stars, gas, dust, and dark matter bound together by gravity. Unlike other deep sky objects like nebulae and star clusters, galaxies typically contain billions to trillions of stars and span immense distances.

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