Lesson 3: Testing the Galaxy

Since visiting the parts of the universe outside our immediate solar system is currently out of the question, astronomers must use various devices to study these far-away objects. In this simulation, you’ll use your results from Lesson 1 along with a variety of tools to identify an unknown astronomical object. Look closely and behold the universe!

Doing the science

1. Start the Galaxy Simulation by clicking on the “Sim” tab.
2. Note and record in Table 1 the 12-character Unknown Object code that appears in the upper right-hand corner of the screen.
3. A given astronomical object appears in the middle of the screen using a view that measures X-rays emitted by the object.
4. Note and record in Table 1 the appearance of the object.
5. Next, select the next view of the same object (ultraviolet) and enter this information in Table 1.
6. Complete a similar process with the remaining three views (visible, infrared, and radio). Make sure to enter your information in Table 1.
7. Select the Spectral Scanner button on the right-hand side of the screen. Note and record in Table 1 the most abundant elements present in the object.
8. Using your information collected in Lesson 1 and your results recorded in Table 1, record in the bottom of Table 1 the name of the Astronomical Object that you think you studied.