Depict a celestial garden floating in the cosmos, with vibrant flowers and plants glowing with bioluminescence. The garden should be surrounded by stars and nebulae, creating a surreal and otherworldly atmosphere. Include a series of floating islands connected by delicate bridges, each island home to different exotic plants. The scene should convey a sense of tranquility and wonder, with intricate details and realism. Ultra- high resolution, 8k, vibrant colors