"Man's bounden duty lies in the courage to explore the truth" is Copernicus's famous saying

Nicolaus Copernicus (Latin: Nicolaus Copernicus, February 19, 1473 - May 24, 1543), Polish mathematician and astronomer during the Renaissance.

Born in Poland in 1473, he was proficient in multiple languages, understood classic literature, was a competent translator, served as a consul, diplomat, and was an economist. At the age of 40, he proposed the heliocentric theory and completed his great work "On the Movement of the Celestial Sphere" after years of observation and calculation. Copernicus's "heliocentric theory" dealt a heavy blow to the church's cosmology and was a great victory in the struggle between materialism and idealism. He devoted his life to the study of astronomy and left a valuable legacy for future generations.