The Sun is the star at the center of the Solar System. It is a nearly perfect ball of hot plasma, heated to incandescence by nuclear fusion reactions in its core, radiating the energy mainly as visible light, ultraviolet light, and infrared radiation. It is by far the most important source of energy for life on earth Earth.
the Sun is exactly at the right distance from the earth so that life does not freeze? and not burn?
Surface temperature: 5,778 K
Mass: 1.989 × 10^30 kg
Radius: 696,340 km
Age: 4.603 billion years
Distance to Earth: 149.6 million km
