The Sun is an average-sized, middle-aged star. Its position, size, motions, temperature, and possession of planets do not make it an extraordinary star. But to us on Earth, it is the greatest star of all, for our existence depends upon its energy.
The Sun rotates west to east on its axis every 25 to 34 days, and it revolves around the center of our galaxy in approximately 230 million years. Since the Sun is not a solid body, all of its parts do not rotate at the same rate of speed. It, however, is rushing through space with a tremendous speed.
The Sun has enormous internal and external temperatures resulting from nuclear reactions that principally involve hydrogen and constantly generate energy.
