http://en.wikipedia.org/wiki/Navagraha

Graha (from Sanskrit ग्रह gráha -- seizing, laying hold of, holding[1]) is a 'cosmic influencer' on the living beings of mother Bhumidevi (earth). In Hindu Astrology, the Navagraha (Sanskrit: नवग्रह, nine planets or nine realms) are some of these major influencers.