When I started learning about Astrology and the "ages" I got pretty curious about how everything worked and what the consensus was about the coming age. I kept hearing about this being the Pisces Age and the ages are playing backwards (retrograde) as opposed to the actual horoscope signs i.e. in horoscopes Pisces comes AFTER Aquarius, but in the "ages" of existence (based on astrology) scenario it's Aquarius that we're coming UPON.
An age, from what I learned, is essentially a 2,500 year span (by one account) of time where human kind is supposed to experience an "age" much like growing kids. Aquarius is likened to us reaching our mature young adult years in this existence. It's an age of a "free mind", meaningful relationships, crystal science's all time high, and none of us can actually fathom it (but the song "The Age Of Aquarius" makes you think your already there, in a utopia from what the lyrics promise).