Science Lesson 3&4

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Across
  1. 2. examines something closely
  2. 5. blue-white core that is left behind cools and becomes
  3. 7. a large cloud of gas and dust containing immense volume of materials
  4. 9. first stage of star's formation
  5. 11. all of space and everything in it
  6. 12. stars brightness as seen from earth
Down
  1. 1. huge explosion
  2. 3. distance that light travels in one year
  3. 4. group of stars bound together by gravity
  4. 6. more accurate scale of the entire solar system
  5. 8. brightness brightness the star would have if it were at standard distance from earth
  6. 10. universe then exploded