Lesson 3 And 4

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Across
  1. 2. the cooled core that is left behind after a star runs out of energy
  2. 5. a group of single stars
  3. 7. cause something to happen in a particular way
  4. 8. explosion of a star
  5. 9. states the universe was all created in an instant billions of years ago
  6. 11. brightness a star would have if it was at a standard distance from earth
  7. 12. first stage of a stars information
Down
  1. 1. distance light travels in one year
  2. 3. a stars brightness as seen from earth
  3. 4. all of space and everything in it
  4. 6. reveal something through detailed examination
  5. 10. a large cloud of gas and dust