How did copernicus's work challenge the accepted view of the universe ?

Nicolaus Copernicus was a Polish astronomer monk of the Renaissance who formulated the heliocentric theory of the solar system, conceived in the first instance by Aristarchus of Samos. His book "On the revolutions of the celestial spheres" is usually considered the starting point of modern astronomy, as well as being a key piece in what was called the Scientific Revolution at the time of the Renaissance. Copernicus spent about twenty-five years working on the development of his heliocentric model of the universe. At that time it was difficult for scientists to accept it, since it was a real revolution.

the correct statement is letter a.   according to the mandate of heaven, kings were considered godlike beings, so they could do as they .

the mandate of heaven is a chinese political and religious ideology used since ancient times to justify the rule of the king or emperor of china, that has been in place since the zhou until the dynasty system ended. it has been created to justify the zhou as the main power of the region. in order to keep harmony, the ruler has to make what he wants and what people want. he had to make good choices to satisfy the people and then they will be happy and keep you in power.