Nicolaus Copernicus (Niklas Koppernigk, Polish bhasa me: Mikołaj Kopernik, 19 February 1473 – 24 May 1543) ek astronomer rahaa. Log Copernicus ke uske suraj aur dunia ke baare me bichar khatir jaanat rahin. Uske bicher rahaa ki dunia, suraj ke right round jaawe hae, jiske baare me uu uu ek book, De revolutionibus orbium coelestium (On the Revolutions of the Heavenly Spheres) me likhis rahaa.