I am sure all of you have heard of how the zodiac changed because some astronomer suddenly "discovers" the precession of the axis, something we have known about for hundreds of years, and also, they also suddenly "discovered" a 13th zodiac sign, Ophiuchus, something that we have also known about for thousands of years. Let me get something straight right now. Nothing has changed!
Astronomers have no business even touching the astrological zodiac, mainly because the tropical zodiac used in Western astrology is based on the seasons, not the actual constellations. Many of the general believers in just the sun sign and nothing else are worrying that their sign has changed, and some have tattoos of their zodiac sign. You'd see why they'd worry.
There are currently two main zodiac types in the world, Tropical (Seasons) and Sidereal (fixed stars.)
The tropical zodiac is used in Western Astrology and is based off the vernal equinox at 0 Aries. Of course, due to the precession, the equinox moves backwards. This creates the Astrological Age. We all know about the Age of Aquarius. The Sidereal system is based off of the actual positions of the constellations, not the constellations themselves. The sidereal system is 23 degrees behind the tropical system. The dates listed on the articles you might read are wrong. This was just another method to try to disprove astrology. Nice try.