The components of the armillary sphere are labeled.

A ‹ equinoctial ring, showing the sun’s ascension › 
b ‹ north pole nut holding sun Ψ › 
B ‹ ecliptic ring, showing location of the sun on a specific day of a month › 
C ‹ tropic of Cancer › 
d ‹ pin holding moon Ζ › 
D ‹ tropic of Capricorn › 
e ‹ where tropic of Cancer touches ecliptic › 
E ‹ arctic circle › 
f ‹ where tropic of Capricorn touches ecliptic › 
F ‹ antarctic circle › 
G ‹ equinoctial colure › 
H ‹ solstitial colure › 
J ‹ terrestrial globe › 
K ‹ terrestrial axis › 
L ‹ flat celestial meridian › 
M ‹ movable horizon › 
n ‹ terrestrial north pole › 
N ‹ celestial north pole › 
N ‹ pedestal › 
O ‹ joint › 
P ‹ arc of joint O (0 to 90 degrees) › 
Q ‹ brass arm › 
r ‹ elevation screw › 
R ‹ upright piece › 
s ‹ terrestrial south pole › 
S ‹ celestial south pole › 
T ‹ box › 
U ‹ 1st of 2 axes of wheels for T (earth turns) › 
V ‹ 2nd of 2 axes of wheels for T (sphere of circles turns) › 
W ‹ winch › 
Ψ ‹ sun › 
Ζ ‹ moon ›