Who is Shukracharya and why did he worship Lord Vishnu?

Shukracharya is a prominent figure in Hindu mythology and is considered to be one of the greatest sages in Hinduism. He was the son of Rishi Bhrigu, one of the seven great sages (Saptarishi) and was the guru of the Asuras or the demon race.

According to Hindu mythology, after the Asuras were defeated by the Devas (gods), Shukracharya performed severe penance to please Lord Vishnu and attain immortality. Lord Vishnu was pleased with his devotion and granted him the Sanjivani mantra, which has the power to revive the dead. Shukracharya then used this mantra to revive the dead Asuras and became their guru.

Shukracharya is also credited with inventing the Mritasanjivani Vidya, a branch of Ayurveda that deals with the healing of the dead. He is revered as a great scholar, teacher, and an expert in the field of astrology and medicine. He is also known for his role in negotiating a truce between the Devas and Asuras during the Samudra Manthan or the Churning of the Ocean