A sunrise occurs when the sun rises above the horizon, marking the beginning of a new day. This natural phenomenon is caused by the rotation of the Earth on its axis, which allows different parts of the planet to be illuminated by sunlight. Sunrises can vary in color and intensity, often displaying beautiful hues of orange, pink, and purple due to the scattering of light in the atmosphere. The time of sunrise changes throughout the year, influenced by the Earth's tilt and its orbit around the Sun. People often enjoy watching sunrises for their beauty and tranquility, making it a popular subject in art and photography. Many cultures also associate sunrises with new beginnings and hope.