Adorable 3D chibi character design, ultra-clean render. A tiny chubby astronaut in a white space suit decorated with colorful planet patches and stickers. Holding a glowing star. Big shiny eyes, rosy cheeks, tiny helmet with reflection. Floating in pastel galaxy background with mini planets. Pixar animation style, soft studio lighting, smooth plastic-like texture. Pure white background version + space version. 8K render.