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Its story

Theta Delphini is an extraordinarily luminous orange giant, lying more than two thousand light-years away in the little Dolphin. Its light, which set out when the Roman Empire was still consolidating its frontiers, crosses the void with the intensity of a star far more massive than the Sun. Delphinus is one of the oldest constellations of the Greek sky, tied to the rescue of Arion by one of these sea creatures.