In this galaxy worksheet, students use the Internet or other resources to answer 13 questions about the galaxy NGC-1232. They are given a photograph of the galaxy to help determine the width and diameter of certain regions of...

In this angular size learning exercise, learners read about how astronomers determine the size of objects in the sky by using their angular size. Students are given equations that allow scientists to convert the angular size into...

In this distance activity, students calculate the angular size or angular diameter of objects at a given distance. This activity has 6 problems to solve.