Universe & Galaxy Review

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Across
  1. 3. A cloud of dust and gas in which stars are formed.
  2. 6. Measures the number of complete wave cycles in a period of time.
  3. 7. A naturally formed object that orbits a planet.
  4. 8. A term used to describe round galaxies.
  5. 11. One __ unit is equal to the average distance between the Earth and the Sun.
  6. 12. A frozen ball of dust and gas that orbits a star.
  7. 13. An irregularly-shaped rocky mass that orbits a star.
  8. 14. The force that maintains the structures of components in the universe.
  9. 15. The height of the wave
  10. 16. The distance from a wave's crest to the next crest.
Down
  1. 1. The first atoms to form.
  2. 2. Light waves compress as the object emitting them moves towards the observer.
  3. 4. Light waves stretch out as the object emitting them moves away from the observer.
  4. 5. A fancy way of saying "to move away."
  5. 7. The type of radiation that can be found all over the universe which likely resulted from the Big Bang.
  6. 9. A unit used to measure the distance between stars or the size of large objects such as a galaxy.
  7. 10. Composed of billions of stars.