How did Zhuge Liang learn to know astronomy and geography?

Zhuge Liang, according to Chen Shou, the author of "The History of the Three Kingdoms", commented: Zhuge Liang is also concerned with the country, comforting the people, showing grace, appointing officials, being subordinate to power, sincere and fair; Although people who are loyal to the times will be rewarded, those who violate the law and neglect their duties will be punished, those who confess their feelings will be released, and those who are eloquent will be slaughtered. Good without reward, evil without fiber without degeneration; Ordinary things are concise, based on physics, with real responsibility for fame and fortune, hypocrisy and contempt; Finally, people who are afraid and love each other in the national territory, although the criminal law is harsh and there is no complaint, are trying to persuade them clearly. It can be said that he is a talented person who knows how to govern the country, and he is a horse of Xiao. But after years of mobilization, it still failed, and the cover strain will be slightly, which is not its strength!

Not as bad as Luo Guanzhong said. Books on astronomical geography are closely related to China's Dachuan myth, such as White Tiger Translation and Heluo. There are no special books on this subject. I suggest reading western books.