Create an image of a fantastical world where swirling galaxies and nebulae are painted on a canvas of vibrant blue skies, blending the boundaries between art and the sky itself.

Generate an image that illustrates a fantastical realm where a mural of the cosmos merges effortlessly with the heavens. The canvas is a rich canopy of shimmering blue speckled with celestial bodies like rotating galaxies and vivid nebulae. These otherworldly elements mix seamlessly with the azure sky, blurring the lines between the terrestrial realm and the cosmic artistry.