SoumyaEXE/3d-Solar-System-ThreeJS ? reverse-engineered prompt

Build me a browser based 3D solar system where people can explore the Sun and planets in a really nice interactive scene. I want each planet to have its own texture, move around the Sun with animated orbits, and let the user zoom, pan, and rotate around the system with the mouse or touch. Make it feel polished and easy to use on both desktop and mobile, with the distances and planet sizes scaled so everything is clear and still looks good.

If it fits naturally, add a simple chat helper powered by Gemini so users can ask quick questions about the planets while they explore. Use the existing NASA inspired textures and make the whole thing load fast and run smoothly in the browser. Please keep it clean, visually appealing, and ready to run locally with a simple install and dev command.