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

	Ovo je djelo u javnom vlasništvu u zemlji podrijetla i u drugim zemljama s rokom trajanja autorskih prava za života autora plus 100 godina ili manje. Morate dodati i oznaku javnog vlasništva za Sjedinjene Američke Države da bi se naznačilo zašto je ovo djelo u javnom vlasništvu u Sjedinjenim Američkim Državama.
	Ova datoteka je identificirana kao slobodna od poznatih ograničenja po zakonu o autorskim pravima, uključujući sva povezana i srodna prava.

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This image comes from the 13th edition of the Encyclopædia Britannica or earlier. The copyrights for that book have expired in the United States because the book was first published in the US with the publication occurring before January 1, 1929. As such, this image is in the public domain in the United States.