Every year, the earth goes once round the sun and as this movement is carried out, from the earth we see the sky in a similar way at the same time of year. This is the basis of Astrology, a superstition which is presented as if the relationship between human behaviour and being born on a certain date under a determined sign of the zodiac had some scientific foundation. To find out more about the zodiac and its signs click  here .
The following visual shows what the Zodiac has to do with the annual movement of the earth.