Sun is an extraordinary star at the center of our solar system, playing a crucial role in sustaining life on Earth. It is a massive, glowing ball of hydrogen and helium, with a diameter of about 1.4 million kilometers (865,000 miles), making it roughly 109 times wider than Earth12. Despite its immense size, the Sun is classified as a yellow dwarf star, which is relatively average compared to other stars in the universe2.The Sun formed approximately 4.6 billion years ago from a cloud of gas and dust known as a nebula2. This process, called nuclear fusion, occurs in the Sun’s core, where temperatures reach about 15 million degrees Celsius (27 million degrees Fahrenheit)1. During fusion, hydrogen atoms combine to form helium, releasing a tremendous amount of energy in the form of light and heat2.