What is the closest star to Earth?

The Sun

The Sun, the star at the center of our solar system, is actually the closest star to Earth, located about 93 million miles (150 million kilometers) away. This gigantic celestial body is responsible for providing all the energy needed for life on our planet. Without the Sun, Earth would be plunged into bitter cold, and no form of life as we know it could exist. The Sun does not only support life; it also influences many terrestrial phenomena, such as the seasons, climate, and day-night cycles.