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The term galactic binary is used for a binary pair of objects (co-orbiting) within the Milky Way, the term typically used when discussing particular types of binaries such as compact object binaries. Typical (e.g., main-sequence) binary stars are generally studied within the Milky Way, and the term galactic binary is generally used for types of binaries that are sometimes also studied at inter-galactic distances, e.g., black hole mergers now observed through GW detections.