The author of Blue to the Sky used many words to describe it in detail. Here are some of them: Sunny: The sky is clear without clouds or rain. 2. Deep: It refers to the deep sky, which is mysterious and quiet without the illumination of the sun or moon. Azure: The color of the sky usually refers to the blue hue of the sea or river. 4. Clear: The sky is clear and transparent, without any impurities or contamination. 5. Tranquility: It refers to the tranquility of the sky. There is no noise or interference, making people feel very quiet. 6. Vastness: It described the vastness of the sky without any limits, allowing people to feel the infinity and vastness of the universe. 7. Softness: The color of the sky is soft and does not have a strong color contrast, giving people a comfortable feeling. 8. Tranquility and beauty: The tranquility and beauty of the sky gives people a comfortable and pleasant feeling. The use of these words made The Blue of the Sky full of delicate emotional descriptions and profound artistic conception, allowing readers to feel the author's unique insights and thoughts about the sky, life and the universe.