solar system - A star and everything that orbits it., 1 galaxy - A huge collection of stars, gas, and dust held by gravity., galaxy group - A small group of 10–50 galaxies bound together., galaxy cluster - Hundreds to thousands of galaxies packed together., supercluster - Clusters & groups tied together in a giant region., universe - Everything—space, time, matter, energy.,

Astronomy: Galaxy Hierarchy Speed Matching

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