What is the sun and how far are they from the earth?

The sun is the closest star to our planet. It is a giant red-hot ball of gas. The temperature on the surface of the Sun is more than 5000 degrees, and inside it reaches 14 million degrees. At this temperature, a thermonuclear reaction can occur that converts hydrogen into helium, which heats up the sun and makes it glow. The distance from the Earth to the Sun is about 150 million kilometers, which is four hundred times greater than the distance to the Moon.