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Introduction
of Zodiac Sign
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What
is the Zodiac?
If
you could observe the motion of the Sun against the
stars for an entire year, it would appear to trace
out a large circle in the sky that we call the "ecliptic".
This circle also happens to be the plane of the Earth's
orbit around the Sun. The zodiac is a thin band of
the sky on either side of the ecliptic. The word "zodiac"
literally means "circle of life", since
most of the zodiac signs are animals or people.
What
are Zodiac Signs?
The
zodiac is divided into 12 signs, each 30 degrees long.
The cycle of zodiac signs starts with Aries, which
begins at the spot on the ecliptic where the Sun is
on the first day of spring. These 30 degree sections
of the sky are actually blocks of space, not time.
Zodiac
signs are often confused in the popular mind with
"sun signs". When a person says, "I'm
an Aries!", what they're really saying is they
were born at a time of the year when the Sun is in
the zodiac sign of Aries. Because our calendar is
designed to mimic the motions of the Sun around the
zodiac, the Sun is in Aries at nearly the same time
period each year (roughly March 20th or 21st to April
19th or 20th). Hence the 12 sun signs are like months
of a calendar based on the zodiac. They represent
time, not space.
The
motions of the other planets through the zodiac signs
can be quite irregular, compared to the Sun's motion.
On average, they range from the fast moving Moon (which
spends about 2-1/2 days in each sign) to the slow
poke Pluto (roughly 12 to 24 years in each sign).
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