Step 1: Concept of Nakṣatras.
Nakṣatras are lunar constellations or star clusters that divide the zodiac into specific segments.
Step 2: Traditional number.
In Jyotiṣa Śāstra, there are traditionally 27 Nakṣatras, each occupying 13°20′ of the zodiac, covering 360° in total.
Step 3: Common examples.
Some examples of Nakṣatras are: Aśvinī, Bharaṇī, Kṛttikā, Rohiṇī, Śravaṇā, Revatī, etc.
Step 4: Eliminating other options.
- 25: Incorrect.
- 30: Wrong, zodiac signs are 12, not Nakṣatras.
- 12: Represents zodiac Rāśis, not Nakṣatras.
Step 5: Conclusion.
Thus, the number of Nakṣatras in Jyotiṣa Śāstra is 27.