Albert Kong (Institute of Astronomy, National Tsing Hua University)
In modern astronomy, there are several major scientific debates concerning distance scale of several classes of astronomical objects (in other words, the distance to the object). Although these debates are settled now, they provide us valuable reviews of the development of astronomy of the 20th century and good examples how to present scientific arguments to convince others. In my graduate course “Galactic Astronomy”, majority of the content is lecture based. In the past, I only present the outcomes of the debates because these problems were already solved and we treat these as common sense. However, I found that the arguments of both sides are intriguing and carry a lot of fundamental knowledge. They are perfect case studies for graduate students to learn critical thinking and research methods.