OF  THE  GLOBES.
415
The  points  determined  by  the  meeting  of  these
circles  are  called  the  poles  of  the  ecliptic,  one
north,  the  other  south.
From  these  definitions  it  follows,  that  longitude ¬
  and  latitude  on  the  celestial  globe  bears  just
the  ſame  relation  to  the  ecliptic,  as  they  do  on  the
terrestrial  globe  to  the  equator.
Thus  as  the  longitude  of  places  on  the  earth  is
measured  by  degrees  upon  the  equator,  counting
from  the  first  meridian;  so  the  longitude  of  the
heavenly  bodies  is  measured  by  degrees  upon  the
ecliptic,  counting  from  the  first  point  of  Aries.
And  as  latitude  on  the  earth  is  measured  by
degrees  upon  the  meridian,  counting  from  the
equator;  so  the  latitude  of  the  heavenly  bodies
is  measured  by  degrees  upon  a  circle  of  longitude,
counting  either  north  or  south  from  the  ecliptic.
The  ſun,  therefore,  has  no  latitude,  being  always ¬
  in  the  ecliptic;  nor  do  we  uſually  ſpeak  of
his  longitude,  but  rather  of  his  place  in  the  ecliptic, ¬
  expressing  it  by  such  a  degree  and  minute  of
such  a  sign,  as  5  degrees  of  Taurus,  instead  of
35  degrees  of  longitude.
The