A galaxy is a system of checks, balances, debates, and more.
 In the 14th century, Syrian-born Ibn Qayyim proposed the Milky Way galaxy was "a myriad of tiny stars packed together in the sphere of the fixed stars
 In bottom-up theories (such as the Searle-Zinn [SZ] model), small structures such as globular clusters form first, and then a number of such bodies accrete to form a larger galaxy

