They call it galaxy because of the wine which high level samsung executives drank, here's the story about that
Samsung Galaxy devices are named after a Terlato Wines wine that high-level Samsung executives often drank. The wine itself is named Galaxy and is a California red blend of merlot, syrah, and cabernet sauvignon. The name had a "premium ring" to Samsung executives according to Ed Ho, a former senior vice president at Samsung.
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