Unit 1 and 2 Vocab

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Across
  1. 3. a collection of around 50
  2. 4. the center region of the milky way
  3. 7. a type of pulsating variable star
  4. 9. The outermost layer of the sun
  5. 10. plasma that extends from the Earth's surface
  6. 11. a stars who's qualities change overtime
  7. 12. a system of billions of stars
  8. 13. young, metal-rich stars
  9. 14. star two stars that revolve around eachother
Down
  1. 1. the amount of light emitted
  2. 2. oldest stars
  3. 5. a cloud of gas and dust in space
  4. 6. celestial object emitting energy
  5. 8. a galaxy with no definite shape