Astronomy for Astrologers
live, is located at some 42° latitude north of the equator.
In fact, there is a circle of cities at 42° latitude that
stretch across the U.S.A. and on around the Earth. Thus,
there are many cities on the globe also located at 42°
north geographic latitude.
Now, an interesting fact about the relation between
geographic latitude and declination in the equatorial
sphere is that there exists a circle of stars on the
celestial sphere located at a declination that matches
the geographic latitude of your home. This circle of
declination and the stars at 42° of declination are the
only stars that ever pass directly (by zenith transit)
overhead your town. Thus, each parallel of geographic
latitude on the Earth has a matching parallel of
declination on the celestial sphere. The diagram below
illustrates this fact.