Examples of using "Tähtitieteilijä" in a sentence and their english translations:
Bradley was an English astronomer.
Galileo Galilei was an Italian astronomer and an important figure in the initial development of the modern sciences. His discoveries contradicted the teachings of the Catholic Church, and Galileo was put on trial for heresy by the Inquisition.
In Copernicus' time most astronomers believed the theory the Greek astronomer Ptolomy had developed more than 1,000 years earlier. Ptolomy said the Earth was the center of the universe and was motionless. He believed all other heavenly bodies moved in complicated patterns around the Earth.