The sun is the star of the center of the sun. It has about five billion years and is composed almost entirely of helium and hydrogen.
Its importance to life on earth is known since prehistoric times.
Even the oldest religion had a "God-sun" powerful and some cultures still practice of honor.
The astronomical symbol of the sun, a circle with a dot in the center, was used in alchemy to represent the gold, one of the seven elements found in its pure form in nature.