Create a stunning background image of a blue galaxy with a slightly blurred effe

Create a stunning background image of a blue galaxy with a slightly blurred effect. The galaxy should be expansive and ethereal, with swirling nebulae, stars, and cosmic dust in varying shades of blue, from deep navy to light turquoise. The image should feel vast and mysterious, evoking a sense of wonder and infinity, while maintaining a soft, dreamy blur to keep it subtle as a background. The overall aesthetic should be serene, captivating, and visually striking.