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

	本作品在其來源國以及其他著作權期限是作者逝世後100年或以下的國家與地區屬於公有領域。 你必須增加美國公有領域標籤顯示為何這個作品在美國屬於公有領域。
	此作品無已知的著作權限制，亦不受所有相關和鄰接的權利限制。

https://creativecommons.org/publicdomain/mark/1.0/PDMCreative Commons Public Domain Mark 1.0falsefalse

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.