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From Celestopedia

This article is a stub - it's quite short. Please help expand it if you can.

A galaxy, historically an island universe is an extremely large disk of stars and gas that all orbits around a supermassive black hole. Galaxies range from small dwarf galaxies to extremely large galaxies several times the size of galaxy clusters. A well-known example of a very large galaxy would be IC 1101, although there are lots more undiscovered galaxies many times the size of IC 1101.

The Sun, Earth, and everything in the solar system is part of the Milky Way, an average-sized galaxy in the local group.

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