1. Of what is this a picture?

2. Galaxies…plus a couple of stars

3. Check out images on Hubblesite.orgHubblesite.org

4. Composition of the universe 1(?) universe 200-500 billion galaxies Each galaxy has about 100 billion – 1 trillion stars – Most stars have many planets

5. Galaxy types (draw sample next to name) Spiral Barred spiral Circular Elliptical Irregular

7. Stars within galaxies Stars do not exist outside galaxies** Within galaxies they can be in: open clusters – Spread out like chocolate chips in a cookie globular clusters (spherical cloud of stars) They are often paired up, called binary stars, which revolve around each other

8. Minute Physics videos Do we expand with the Universe? How big is the Universe? 3 ways to time travel What is the Universe? Science of Parallel Universes