Hinduism,Cosmos ,Sanatan Dharma.Ancient Hinduism science.
It is a poem written by Tulsidas in the Awadhi language, and is his best known Hindu text apart from the Ramcharitmanas. The word “chālisā” is derived from “chālis” in Hindi, which means 40, as the Hanuman Chalisa has 40 verses. Hanuman Chalisa (Hindi: हनुमान चालीसा “Forty chaupais on Hanuman”) , composed by great devotee and sage Goswami Tulsidas, is a devotional prayer recited daily by Millions Hindus in morning prayers. Devotees also recite at the times when they have to ask protection and help from Lord Hanuman who is servant of Ram. Hanuman is the Param-Bhagavat, the topmost devotee in this cosmos. Hanuman Ji is himself Lord Shiva and thus also comes in Ishwara-Koti.
While describing greatness of lord Hanuman in Hanuman Chalisa, Goswami Tulsidas, the greatest devotee of lord Ram in Kaliyuga, mentioned the distance between SUN and EARTH very correctly in simple words. This shows not only spiritual greatness but also scientific knowledge and enlightement of Goswami Tulsidas.