I believe that at the time of Galileo and other pioneers in astronomy there was no formal astronomy study; he (and others) must have learned most of what they knew by themselves.
yes.
Galileo.
Some of Galileo's most significant work was in the field of kinematics, identifying that the total ...by him (or to be written by him) were forbidden, though this latter part was not enforced. ... Galileo Galilei - major areas of study ...
astronomy,mathematics,physics and philosophy
Philosophy, astronomy, and physics.
Galileo Galilei was an Italian polymath who lived in the 16th and 17th centuries. He made significant contributions to the fields of physics, astronomy, and mathematics. Galileo is often referred to as the "father of observational astronomy" for his pioneering use of telescopes to study the night sky.
Galileo left medicine to study mathematics, physics, and astronomy. He became known for his groundbreaking work in these fields and played a key role in the Scientific Revolution.
Galileo Galilei
Modern astronomy.
Astronomy
In astronomy, he used a telescope.
Yes