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The Galaxy Viewer app is a 3D visualization tool that allows users to explore a realistic representation of the Milky Way galaxy. It generates a dynamic galaxy structure with customizable parameters, enabling users to adjust the appearance and behavior of the galaxy in real-time. To use the app, users can interact with various controls to modify settings such as the number of stars, their size, the galaxy's radius, the number of spiral arms, and the randomness of star placement. Users can also change the colors of the galaxy's core and edges, toggle features like auto-rotation, constellations, and star labels, and select the quality of the rendering. The app provides a user-friendly interface with sliders for parameter adjustments and buttons for additional functionalities like resetting the view, taking screenshots, and toggling fullscreen mode. The app is built using modern web technologies, including React for the user interface, TypeScript for type safety, and Three.js for 3D rendering. It leverages the React Three Fiber library to integrate Three.js with React, allowing for a seamless experience in rendering 3D graphics. The app also utilizes Radix UI components for sliders and labels, ensuring accessibility and a consistent design. Key features of the Galaxy Viewer app include: - Real-time 3D rendering of a customizable galaxy with adjustable parameters. - Interactive controls for modifying galaxy properties, including star count, size, and colors. - Options to display constellations and star labels for enhanced exploration. - Auto-rotation feature for continuous viewing of the galaxy. - Screenshot functionality to capture the current view. - Fullscreen mode for an immersive experience. - Keyboard shortcuts for quick access to common actions. Overall, the Galaxy Viewer app provides an engaging and educational way to explore the structure of our galaxy, making it suitable for both casual users and those interested in astronomy.