Chapter 28/29

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Across
  1. 2. When a light source is moving away from an observer, what color is seen?
  2. 3. Who noticed that the galaxies were moving away from each other?
  3. 6. What are groups of stars with names from antiquity?
  4. 8. Rule that correctly describes a natural phenomenon.
  5. 10. What about a star indicates its temperature?
Down
  1. 1. The theory that states the universe was formed from an explosion.
  2. 4. Small rocky bodies that orbit the sun.
  3. 5. A huge assemblage of stars, interstellar gas and dust.
  4. 7. Milky way galaxy and its neighboring galaxies.
  5. 9. Violet is seen when a light source is moving ____ an observer.