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

概要

ライセンス

	この著作物は、著作権の保護期間が著作者の死後100年以下である国・地域においてパブリックドメインの状態にあります。 この著作物がアメリカ合衆国においてパブリックドメインの状態にあることを示すために、アメリカ合衆国のPDタグも貼る必要があります。
	このファイルは著作権法の既知の制約（隣接権や関連する権利を含む）から自由であると特定されています。

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.