However the most modern calculations in 20th century estimate the distance to be somewhere around 23455 times the radius of Earth (149,431,805 kms assuming radius of Earth to be 6371 kms).
This was also aided by the invention of telescope in the beginning of the 17th century which helped them to get more accurate measurements. Kepler’s law of Planetary Motion allowed astronomers to calculate the relative distance of the planets from Sun. However, Johannes Kepler (1571–1630), a German Mathematician and Astronomer realized that these estimates were significantly low. Ptolemy considered the distance to be 1210 times the radius of Earth.Later, Hipparchus (2nd century BC) gave an estimate of 490 times the radius of Earth.Archimedes, an ancient Greek Mathematician and Philosopher of the 3rd century BC, estimated the distance of Sun from Earth as 10000 times the radius of Earth.The Greek Astronomers were known for their contribution to the scientific field in understanding the heavenly bodies. The Quest of Astronomers to find the distance of Sun It is believed that in one of these verses of Hanuman Chalisa, Tulasidasa had given an accurate calculation of the distance between the Sun and Earth. Many devotees regularly recite Hanuman Chalisa, a prayer glorifying Shri Hanuman, composed by this great saint and poet. He composed the Rama-charita-manasa, the epic story of Lord Rama retold in the vernacular language. He was a great devotee of Lord Ramachandra who lived in the 16th century. Hanuman Chalisa was composed by Gosvami Tulasidasa.
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