No, Galileo Galilei is not considered the "dumbest astronomer" on record. In fact, Galileo is widely regarded as one of the most influential astronomers and scientists in history. He made significant contributions to the fields of physics, astronomy, and mathematics.
Galileo's support for Nicolaus Copernicus' heliocentric model of the solar system was a groundbreaking and revolutionary idea during his time. Copernicus proposed that the Earth and other planets revolve around the Sun, challenging the prevailing geocentric model that placed Earth at the center of the universe. Galileo's observations with his telescope provided further evidence in favor of the heliocentric model.
It's important to remember that scientific progress relies on challenging existing beliefs and theories, and Galileo's work played a crucial role in advancing our understanding of the universe. While his ideas were met with controversy and opposition from the Catholic Church at the time, his contributions to astronomy and physics laid the foundation for modern scientific thought. Today, Galileo is celebrated as a pioneer and a key figure in the Scientific Revolution.