Kaal Sarp dosha
Kaal Sarp dosha is said to form when all seven planets lie on one side of the Rahu–Ketu axis. It is a modern addition to astrology, not found in the classical texts, and its weight is debated.
Also known as: Kaal Sarp yoga, Kala Sarpa yoga, Kalsarp dosh, Kalasarpa dosham
The full guide: Kaal Sarp Dosh: Meaning, 12 Types and a Balanced View
Rahu and Ketu are always exactly opposite each other. When the Sun, Moon, Mars, Mercury, Jupiter, Venus and Saturn all fall in the half of the chart on one side of them, the chart is said to have Kaal Sarp, the “serpent of time”. Twelve types are named by Rahu’s house, from Anant (1st) to Sheshnag (12th).
The combination does not appear in Brihat Parashara Hora Shastra, Phaladeepika, Saravali or the other major classical works; it became widely discussed in the twentieth century. Some astrologers find it meaningful, while others give it little weight.
Those who use it describe effort that pays off later than expected, and sudden ups and downs. Many accomplished people have it. If even one planet stands outside the axis, many call it partial or absent, and some distinguish the direction (Rahu to Ketu, or Ketu to Rahu, sometimes called Kaal Amrit).
There is no need for fear or expensive rituals on its account. Read it as one feature of the chart, and consult a qualified astrologer before acting on it.