Navagraha

The term Navagraha combines nava ('nine') and graha (a term used for planets and literally glossed as 'seizer' or 'one who lays hold of'). Its conceptual formation draws on Vedic recognition of Sun and Moon and on later incorporation of planetary concepts; historical syntheses with Hellenistic, Babylonian and Indo‑Iranian astral ideas contributed to the full ninefold set. Rahu and Ketu, the two lunar nodes (chaya‑grahas or 'shadow' grahas associated with eclipses), were integrated into the canonical nine over a long process of cosmological development that reached medieval stabilization by around the early medieval period.

In ritual and temple art each graha is anthropomorphized with distinguishing attributes, colours, mounts (vahanas), arms and weapons; iconographic programmes developed from roughly the 5th–12th centuries CE. Typical motifs cited in textual and temple sources include Surya shown standing or seated in a chariot drawn by seven horses and holding lotuses (often wearing northern‑style boots and armour in classical depictions); Chandra riding a chariot sometimes pulled by an antelope or shown with a hare and carrying a lotus; Mangala (Mars) with a red complexion riding a ram and bearing a trident and mace; Shani (Saturn) depicted in dark blue or black; Rahu and Ketu depicted as the chaya‑grahas conventionally rendered in serpentine or partially dismembered forms (Rahu as a severed head and Ketu as a headless torso with a serpent tail). Regional variation exists (for example, South Indian Shaiva temple arrangements differ from North Indian lintel guardians) and full iconographic detail varies by period and locality.

Within Jyotisha the Navagraha are treated as causal agents in astrological theory: they 'rule' particular rasis (zodiac signs), govern domains of life, and preside over temporal regimes such as dashas (planetary periods). Traditional classification distinguishes natural benefics (for example Jupiter, Venus, Mercury and the waxing Moon in many schemata) and natural malefics (for example Mars, Saturn and the shadow planets, with variations including the Sun); adverse configurations are termed dosha. Beyond technical computation the grahas function as objects of worship and ritual propitiation—texts, stotras and homams address them to gain favor or mitigate harm—and they are embedded in temple practice, pilgrimage circuits and devotional music.