Grahan Dosha occurs when Sun or Moon conjuncts Rahu or Ketu (resembling eclipse). Sun-Rahu/Ketu affects father/authority; Moon-Rahu/Ketu affects mother/emotions. Effects depend on the house and sign of conjunction.
Doshas in Astrology FAQ
Grahan Dosha occurs when Sun or Moon conjuncts Rahu or Ketu (resembling eclipse). Sun-Rahu/Ketu affects father/authority; Moon-Rahu/Ketu affects mother/emotions. Effects depend on the house and sign of conjunction.