|Mean Distance From Earth: 149.60 million kilometers (92.96 million miles).
Age: 4.6 Billion Years
Composition: 92.1% Hydrogen, 7.8%Helium
The Sun, a huge sphere of mostly ionized gas, supports life on Earth. It powers photosynthesis in green plants, and is ultimately the source of all food and fossil fuel. The connection and interactions between the Sun and Earth drive the seasons, ocean currents, weather, and climate.
Zodiac Sign Rulership: Leo
In the solar system the Sun is the center around which all the other planets revolve, bound by its gravitational force. Similarly, in the birth chart the Sun represents the "center" of our personality, or the core of our being, around which all the other psychological drives and needs, symbolized by the planets, revolve.
Just as, in the solar system, the Sun is the source of light and life generating energy, so the Sun represents the source of consciousness and life within us all. It is our will to be and our sense of individuality. The birth chart, however, represents the solar system as seen from the earth, not the Sun. Most of us are not centered in our Sun, but in our earth-bound, or sense-bound ego. For most of us then, the Sun represents our "Higher Self" or Spirit. It is the immortal spark of the universal spirit which is uniquely ourselves, as opposed to our transient and mortal ego centered personality. The Sun is therefore what we are striving to become.
The Sun's sign position and aspects to the Sun, as seen from the earth, show how this radiant inner self works through the medium of our ego centered personality. It is the fundamental tone of our being, and as such is the most important placement in the chart.