Create a mesmerizing artwork depicting a translucent unicorn with a body that resembles a swirling nebula in the vast expanse of space. The unicorn's ethereal form is partially transparent, revealing glimpses of the cosmic clouds and stars swirling within its essence. Its majestic horn gleams with a radiant iridescence, casting a soft, otherworldly glow around it. The nebula body of the unicorn shimmers with a myriad of colors, from deep purples and vibrant blues to fiery oranges and soft pinks, creating a celestial symphony of hues that dance and shift with a cosmic energy. The unicorn stands against a backdrop of a star-filled sky, with distant galaxies twinkling in the infinite darkness, evoking a sense of wonder and magic that transcends time and space.