Sidereal astrology differs from traditional astrology in that it projects real zodiacal constellations onto the ecliptic, rather than just dividing it into 12 parts, starting from the vernal equinox. In addition, the sidereal approach takes into account the phenomenon of precession, which was discovered by Hipparchus back in II century BC, and it invariably (from century to century) affects the shift of the star pattern that we see from Earth. The pictures below illustrate this clearly. Also in this article, I provide a set of parameters that I use for sidereal calculations.
Everyone knows about classical astrology of 12 zodiac signs because media made it very popular. Someone have heard of vedic astrology, which is based on Indian philosophy; It's actively used by people who are fond of yoga. But few people know about the sidereal astrological system, which is based on real astronomical data. Studying and practicing astrology, I became an adherent of the sidereal approach - its results impressed me very much. To show you visual differences between the tropical, vedic and sidereal systems, I made an infographic. 
Please wait 
Article "Born under the sign of Ophiuchus and ignored by horoscopes: The dilemma of our time" by John Mosley of the Griffith Observatory, which was published in July 1988. In this article, he describes how the signs of the Zodiac differ from the constellations and tells where Ophiuchus came from. 
