A cosmic-themed illustration for an ebook cover, featuring a luminous, interconnected network of sacred geometry symbols floating in space, with elements of the number 9, the Fibonacci spiral, and a celestial backdrop. The design is harmonious and abstract, with a mysterious and philosophical tone. The image should convey an ancient yet timeless feel, hinting at the interconnection between math, spirituality, and the cosmos. The colors should be rich and ethereal, blending blues, golds, and deep purples, with a sense of cosmic wonder.
