What's the difference between readership and circulation? Circulation is a count of how many copies of a particular publication are distributed. Circulation audits are provided by the Audit Bureau of Circulations (ABC). Readership is an estimate of how many readers a publication has.
But understanding the planets will help you make more sense of things like your Sun and Moon signs, and you'll be better clued in the next time someone's ranting about Mercury going retrograde again, or how Venus relates to their love life.
