Create a clean and minimalist digital illustration in a Japanese cartoon style, optimized for a mobile screen with a 9:16 aspect ratio. The background should be predominantly white with soft pastel accents, ensuring ample whitespace for clarity. Focus on a select few celestial bodies, each uniquely characterized and anthropomorphized to clearly represent specific planets: a radiant sun with distinctive rays, a crescent moon with visible craters, a ringed Saturn with a playful expression, and a vibrant Earth with lush greenery and oceans. Each planet should have a three-dimensional appearance with shading and highlights to enhance depth. Include uplifting messages in English: "The whole universe is here to help you" in a playful handwritten style. Use a harmonious pastel color palette of pinks, yellows, and blues to convey joy and positivity. Ensure a balanced composition with distinct foreground and background elements for visual appeal.