chemoreceptor (kÄÂ´mÅrÄsepÂ´tÉr) , n a specialized sensory end organ adapted for excitation by chemical substances (e.g., olfactory and gustatory receptors) or specialized sense organs of the carotid body that are sensitive to chemical changes in the bloodstream.
Nicolaus Copernicus was born on 19 February 1473 in the city of ToruÅ (Thorn), in the province of Royal Prussia, in the Crown of the Kingdom of Poland.His father was a merchant from Krakow krakÃ³w and his mother was the daughter of a Wealthy toruÅ. Merchant nicolaus was the youngest of four. childrenopernicus was born and died in Royal Prussia, a region that had been a part of the Kingdom of Poland since 1466. He was a polyglot and polymath who obtained a doctorate in canon law and also practiced as a physician, classics scholar, translator, governor, diplomat, and economist.
From Wikipedia, the free encyclopedia. Nicolaus Copernicus (February 19, 1473 â May 24, 1543) was the astronomer who provided the first modern formulation of a heliocentric (sun-centered) theory of the solar system, in his epochal book, De revolutionibus orbium coelestium (On the Revolutions of the Celestial Spheres). Copernicus was one of the great polymaths of the Renaissance.