A sunset occurs when the sun dips below the horizon, marking the end of the day. This natural phenomenon is caused by the rotation of the Earth, which causes the sun to appear to move across the sky. As the sun sets, its light passes through more of the Earth's atmosphere, scattering shorter wavelengths and creating vibrant colors like orange, pink, and purple. Sunsets can vary in appearance depending on weather conditions, geographic location, and the time of year. Factors such as clouds, pollution, and humidity can enhance or diminish the colors seen during a sunset. Many people enjoy watching sunsets for their beauty and the sense of calm they can bring.