ChatGPT4: “The color of the sky can vary depending on the time of day and atmospheric conditions. During a clear day, the sky appears blue due to the scattering of sunlight by the atmosphere. At sunrise and sunset, the sky can appear red, pink, or orange due to the scattering of light by particles and air molecules, which is more pronounced when the sun is low on the horizon. At night, the sky is generally dark, appearing black to the human eye due to the absence of sunlight.”