Ήλιου is the Greek word for "sun." It refers to the star at the center of our solar system, which provides light and warmth to Earth. The sun is essential for life, influencing weather patterns and supporting photosynthesis in plants. In Greek mythology, Ήλιου is also associated with Helios, the personification of the sun. Helios was often depicted driving a chariot across the sky, symbolizing the daily journey of the sun. This connection highlights the cultural significance of the sun in ancient Greek beliefs and its impact on daily life.