+A galaxy is a vast cosmic island, a gravitationally bound system of [Stars](/wiki/star), gas, dust, and dark matter. These majestic structures, varying in shape and size, are fundamental building blocks of the observable [Universe](/wiki/universe).
+## See also
+- [Milky Way](/wiki/milky_way)
+- [Black Hole](/wiki/black_hole)
+- [Dark Matter](/wiki/dark_matter)
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