Curated OER
Exploring a Galaxy
For 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 the galaxy.
Curated OER
Chandra Explores Angular Size
In this angular size learning exercise, students 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...
Curated OER
Angular Size and Velocity
In this distance learning exercise, students calculate the angular size or angular diameter of objects at a given distance. This learning exercise has 6 problems to solve.