Act as a visionary botanist with expertise in extraterrestrial horticulture, tasked with designing a futuristic greenhouse for cultivating exotic alien plants. Create a visually stunning DALL-E image of a sprawling, high-tech greenhouse set on a distant planet. The structure should feature [translucent bio-luminescent walls], [floating hydroponic systems], and [glowing alien plants] of various shapes, sizes, and colors. Include intricate details like robotic caretakers tending to the plants, a central control hub with holographic displays, and a backdrop of an alien sky with two moons. The scene should evoke a sense of wonder, blending advanced technology with the beauty of unfamiliar flora.