Satellites like Dhooma
Satellites like Dhooma are considered bad if they are in Trika ( 6,8,12) houses, Dhoomadi Rimphari Mritheesa Papai !
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7 Adhi Masas
7 Adhi Masas or Intercalary Months had to be inserted, as 235 lunar or synodic months = 228 solar months ! Full article here at http://www.astrognosis.com/html/intercalarymonths.asp
Sheegrocha Kala
Sheegrocha Kala is defined as the time taken by a celestial body to move from its Perihelion point to the same point. In the case of Moon, its Perigee Point.
Thuga Kala
Thuga Kala is defined as the time taken by a planet to move from its Ascending Node Point to the same point.
Vikram Samvat
The Rishies gave different names starting from Prabhava for the Jovian Cycle of 60 years !