Final answer:
Galileo Galilei, Johannes Kepler, and Edmund Halley were notable astronomers of the 16th and 17th centuries.
Step-by-step explanation:
In the 16th and 17th centuries, there were several astronomers who made significant contributions to the field of astronomy.
Galileo Galilei: Galileo used the telescope to observe the sky and revolutionized our understanding of the planets and the position of Earth.
Johannes Kepler: Kepler placed the speculations of Copernicus on a sound mathematical basis and made important observations, including the discovery of his own supernova.
Edmund Halley: Halley made contributions in many fields of science and statistics, and his work encouraged and supported Isaac Newton.