In this session we’ll begin the practice of observing the night sky. The main point of this activity will be to estimate the azimuth, altitude, and angular size of a number of objects. Familiarize yourself with the figure below. It is a handy guide for estimating angles with your hand when held at arm’s length. Activities take place on the roof of Van Allen Hall on in the lab room. Follow your instructor's directions and continue to work within your lab groups.