He looked through his telescope!
When did Copernicus write his book on the solar system?
heliocentric system
heliocentric system
Nicolaus Copernicus.
Copernicus
Nicolaus Copernicus proposed the heliocentric model of the solar system in his book "De Revolutionibus Orbium Coelestium" in 1543, which suggested that the sun, not the Earth, was the center of the solar system.
the sun is the center of the solar system.
he founded the solar system
copernicus
He followed Copernicus's model of the solar system which places the Sun at the center of the solar system instead of the Earth.
In the 16th century, Copernicus proposed the heliocentric model that placed the Sun at the center of the solar system, not the Earth. This model was further supported by Galileo's observations using a telescope in the early 17th century.
From about 1510-1514 Copernicus developed his first general outline of his new heliocentric system.