Ancient stone sites, such as Stonehenge, show the progression of the tropical year by illuminating when the sun is exactly at a solstice or equinox point. It takes the sun to go from the exact winter solstice to the next winter solstice. A “year” later is the tropical year. The zodiac is based on this tropical year has been for thousands of years.
The Sun is represented by the centre of the horoscope, the circle in the middle. This also symbolised the light of Jesus who claimed to be the ‘Son of God’, meaning the ‘Sun of God’, the Sun and the light, with the 12 zodiac signs encircling him