The color of our sky is one of nature's most beautiful phenomena, yet it's rooted in elegant physics. During the day, our sky appears blue because of a process called Rayleigh scattering. When sunlight enters Earth's atmosphere, it collides with gas molecules and small particles. Blue light has a shorter wavelength than other colors, making it scatter more easily in all directions.
At sunset, the sky transforms into a spectacular display of reds, oranges, and yellows. This happens because the sun is lower on the horizon, and its light must travel through a thicker layer of atmosphere to reach our eyes.