This phrase likely refers to a work of fiction, possibly in the romance or fantasy genre, where the titular character holds a significant, perhaps mystical, connection to the cosmos. Examples of such a connection could involve astrology, astronomy, or a more metaphysical guardianship role over celestial bodies.
Stories featuring celestial themes often explore profound concepts like destiny, time, and the vastness of the universe. These narratives can offer readers a sense of wonder and escapism, prompting reflection on humanity’s place in the cosmos. The popularity of such themes likely stems from a long-held human fascination with the stars and their potential influence on earthly events, evident in the historical significance of astrology and astronomy across various cultures.