In your textbook, read about the shape of the Milky Way.
For each
statement below, write true or false.
6. Radio waves are used to map the Milky Way because they can penetrate
the interstellar gas and dust without being scattered or absorbed.
7. The Milky Way's galactic nucleus is surrounded by a nuclear bulge that
sticks out of the galactic disk.
8. Measurements of star luminosity at different distances provide a hint of
the Milky Way's spiral arms.
9. Around the Milky Way's nuclear bulge and disk is the halo, where the
globular clusters are located.
10. Astronomers mapped the emission wavelength of nitrogen gas in space
to conclusively determine the existence of spiral arms in the Milky Way.
11. Five major spiral arms and a few minor arms were identified in the
Milky Way.
12. The Sun is located in the Milky Way's minor arm Orion at a distance of
28,000 ly from the galactic center.
13. In its 4.5-billion-year life, the Sun has orbited the galaxy approximately
100 times.