The Sun is the closest star to Earth, and lies at the center of our solar system. It is a yellow dwarf star and its gravity holds all other celestial objects in the solar system in its orbit. The Sun is about 4.6 billion years old and its diameter is 109 times that of the Earth. The light from the Sun takes 8 mins 19 secs to reach Earth. The Sun's energy drives the weather and climate on Earth, and supports almost all life on Earth.