Ketu, one of India's most prominent astrological planets, is traditionally worshipped with offerings to Lord Ganesha. Devotees can offer Durva (grass) as an offering to Ganesha and recite the Shri Ganapati Atharvashirsha Stotra. Alternatively, one can also worship the Matsya (fish) Avatar of Lord Vishnu as an offering to Ketu. One can seek guidance and protection from Ketu's astrological influence by worshipping either of these gods.