Across
- 2. Theory that proposes that the universe originated as a single mass, which subsequently exploded
- 4. Group of stars, dust, and gases held together by gravity
- 6. A system of galaxies containing from several to thousands of member galaxies
- 7. Type of galaxy Milky Way is
- 8. Evidence the universe is expanding
- 10. Law that states that the galaxies are retreating from the Milky Way at a speed that is proportional to their distance
Down
- 1. Type of telescope NASA uses to learn about the Milky Way
- 3. The name of our galaxy
- 5. Possible black holes in the middle of young galaxies
- 9. How many types of galaxies there are