Just
like Rahu, Ketu is also an imaginary planet, a node. The two nodes, Rahu and
Ketu are positioned where the earth's trajectory around the Sun and the
Moon's trajectory around the Earth meet. According to Indian mythology, Ketu
represents the tail of demon(just like Rahu represents the head). The two
planets are the parts of the same danava(demon) but are 180 degree apart
from each other.
When Ketu, Sun and Moon lie in the same zodiacal longitude lunar eclipse
takes place.
Ketu in certain way resembles
Mars. But many
times, it activates only the negative side of Mars. This is why people ruled
by Ketu are secret adversaries. It also influences people in pharmaceutical
industries, doctors, and astrologers.
The two imaginary nodes, Rahu and Ketu are the mysterious forces and show
in the birth chart both karmic and spiritual influences. Like
Rahu, Ketu is also not a real luminary and
therefore doesn't rule any zodiac sign.
