
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.