As we, all know about the studies and how much that is important in ones life. Actually if you see interior these studies are compared to some god according to their mythology that they follow.Suppose if you take about the Hindu mythology that is the fact. Let us see.
Here according to the Hindu, they pray to the lord guru, because they believe that he is the god who provides a good education, memory, thought, and humanity like that. He is also considering as the symbol of piousness.
You know he is also called as the brahaspathi.
If you move just little forward, in case of Vedas this god of education is consider as a one of the planet in the space. The name of the planet is Jupiter.
The favorite colour for this planet is yellow. Then stone is a yellow topaz. You know one thing this legend has seven rays. Eight horses draw his chariot.