The Most Powerful Prayer of Planet Sun – aditya hridaya stotra mantra homam – The Heart of Aditya (the Sun God) Aditya Hridayam – The Heart of Aditya (the Sun God) – Sundara Khanda, Valmiki Ramayanam Aditya = the Sun God; Hridayam = that which is particularly sustaining and recuperating for the heart.