Astro 10-Lecture 13: Quiz

• T/F We are near the center of our Galaxy

• Cepheid variable stars can be used as distance indicators because

  • They all have the same parallax
  • They all have the same instrinsic brightness
  • The is a relationship between the period of their variability and their luminosity.
  • The are all the same size

• Draw an edge on picture of the galaxy. Label the disk, bulge, globular clusters, and halo. Give the approximate diameter in light-years or parsecs.

• T/F The brightest stars in our galaxy are found near spiral arms.

Notes: