Zodiac
The Earth in
its orbit around theSun causes
the Sun to appear on the celestial sphere moving over theecliptic (red),
which is tilted with respect to the equator (blue-white).
In both astrology and
historical astronomy, the zodiac (Greek:
ζῳδιακός, zōidiakos) is a
circle of twelve 30° divisions of celestial longitude that are centered upon
the ecliptic:
the apparent path of the Sun across
the celestial sphere over the course of the
year. The paths of the Moon and
visible planets also
remain close to the ecliptic, within the belt of the zodiac, which extends 8-9°
north or south of the ecliptic, as measured in celestial latitude. Because the divisions are
regular, they do not correspond exactly to the twelveconstellations after
which they are named.
Historically, these twelve divisions are called signs. Essentially, the zodiac is a celestial coordinate system, or more specifically anecliptic coordinate system, which takes the ecliptic as the origin of latitude, and the position of the sun at vernal equinox as the origin of longitude.
№
|
Symbol
|
Long.
|
Latin name
|
1
|
♈
|
0°
|
|
2
|
♉
|
30°
|
|
3
|
♊
|
60°
|
|
4
|
♋
|
90°
|
|
5
|
♌
|
120°
|
|
6
|
♍
|
150°
|
|
7
|
♎
|
180°
|
|
8
|
♏
|
210°
|
|
9
|
♐
|
240°
|
|
10
|
♑
|
270°
|
|
11
|
♒
|
300°
|
|
12
|
♓
|
330°
|
