A futuristic garden built on a small asteroid drifting near a nebula

A futuristic garden built on a small asteroid drifting near a nebula. Holographic trees, glowing alien plants, and floating garden paths span the rocky surface. A quiet observation bench sits at the edge, facing a glowing gas giant in the distance. Dreamy sci-fi fantasy blend, meditative and still, neon bioluminescent color palette, ultra-detailed.