Artists craft visual astronomy in outdoor sculpture installations by merging scientific inspiration with creative expression. They often incorporate celestial themes like stars, planets, and galaxies into their designs, using materials that reflect light or glow at night to mimic cosmic phenomena. Techniques such as laser-cut metalwork, LED lighting, and reflective surfaces help simulate the night sky. Some installations even align with astronomical events, like solstices or eclipses, adding an interactive layer. By blending art and science, these sculptures transform public spaces into immersive experiences that evoke wonder and curiosity about the universe.