I was unable to find the source for this image – if you are the artist please contact me.
I’ve been surprised to still find writings that fix the beginning of the Age of Pisces at year zero, roughly coinciding with the birth of Jesus, with the Age of Aquarius beginning in the year 2000. This is a historical fallacy and not based in any kind of astrological or astronomical principle. For one thing, each age is approximately 2160 years. Many astronomers put the beginning of the age of Pisces at 498 b.c.e., indicating entry into Aquarius in approximately 2658 c.e. From Wikipedia:
In 1928, at the Conference of the International Astronomical Union (IAU) in Leiden, the Netherlands, the edges of the 88 official constellations became defined in astronomical terms. The edge established between Pisces and Aquarius locates the beginning of the Aquarian Age around the year 2600.
The Austrian astronomer, Professor Hermann Haupt, examined the question of when the Age of Aquarius begins in an article published in 1992 by the Austrian Academy of Science: with the German title Der Beginn des Wassermannzeitalters, eine astronomische Frage? (The Start of the Aquarian Age, an Astronomical Question?). Based on the boundaries accepted by IAU in 1928, Haupt’s article investigates the start of the Age of Aquarius by calculating the entry of the spring equinox point over the parallel cycle (d = – 4°) between the constellations Pisces and Aquarius and reaches, using the usual formula of precession (Gliese, 1982), the year 2595.
This interesting site gives astronomical star maps redrawn from ancient Greek writings to show why this date works. However, because of the lack of clear boundaries between the constellations it is impossible to clearly state a date […]