Navagraha homam is a comprehensive and potent yagna done to invoke the blessings of the nine planets. The homam is performed in nine stages, with separate offerings and mantras for each of the nine planets. The Navagraha homam should be performed to overcome doshas such as Sani / Rahu / Ketu doshas or when the 'dasa' (ruling period) of a debilitated or afflicted planet is about to begin in our life (e.g. Sani dasa or Sade Sathi). Its benefits are manifold since it is a comprehensive remedy for all problems.