Question

To which specific category of astronomical texts does the famous work 'Grahalaghava' by Ganesh Daivajna belong?

• A. Karanagrantham
• B. Siddhantagrantham
• C. Tantragrantham
• D. Prashnagrantham

Hint:

"Karana" comes from the root 'Kri' (to do). It is a "doing" manual—a handbook for practical work. Grahalaghava (Easy Planets) is the ultimate practical handbook.

Answer 1

The Correct Option is A

Step 1: Understanding the Concept:
Indian astronomical literature is divided into three types based on the epoch (starting point) and the complexity of math:
1. Siddhanta: Starts calculations from the beginning of the Kalpa (e.g., Surya Siddhanta).
2. Tantra: Starts calculations from the beginning of Kali Yuga (e.g., Aryabhatiya).
3. Karana: Practical manuals designed for daily use by almanac makers. They use a recent epoch and simplified mathematical ratios to make calculations fast and easy.

Step 2: Detailed Explanation of Grahalaghava:
The Grahalaghava was composed by Ganesh Daivajna in 1520 CE (Saka 1442).
- The word "Laghava" means "Lightness" or "Ease." The text's primary goal was to calculate planetary positions without the use of complex trigonometric sines (Jya).
- It uses a simplified arithmetic approach that can be performed quickly by hand.
- Because it uses a contemporary epoch and focuses on ease of practical calculation for priests and astrologers, it is the quintessential example of a Karana text.

Step 3: Importance:
Even today, many traditional Panchang makers in India use the Grahalaghava as their primary manual because of its practical and simplified nature compared to the massive theoretical Siddhanta texts.

Step 4: Final Answer:
Grahalaghava is classified as a Karanagrantha.