Can the model of the instrument you made in the first lesson be called the model of the main instrument of the Ulugbek Observatory?

Yes, since the main element of the two devices is the arc that the light hits. It allows you to determine the height of the sun above the horizon.

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.