Until the 1600’s, people who investigated problems related to our understanding of the natural world were called __?

Philosophers

Explanation:

Until the 1600's people who studied the natural world were called Philosophers.

Nowadays, we call them scientists.

Socrates, Aristotle, Democritus and other notable scholars of those days were all called Philosophers but they made important contribution that would help understand system of the natural world.

the working equation for the angular size is the product of the physical size and 360 degrees divided by the product of two pi and distance from earth. the minimum size would be 0.559 degrees while the maximum size would be 0.49 degrees.