Where are we in the Milky Way?

The goal of this exercise is to consider evidence that could be used to locate our position in our Galaxy:  visual Milky Way, radio observations, comparison with Andromeda Galaxy.  It is part of a collection of short lecture-tutorial (or homework) activities, designed to be both quantitative and accessible to the introductory astronomy student. Each of which involves interpreting some real data, solving a problem using ratios and proportionalities, and making a conclusion based on the calculation.