Space

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Across
  1. 2. a less massive object that orbits a planet
  2. 5. The final stage of a large star; has intense gravity
  3. 6. 90% of all stars
  4. 10. a human that goes out into space
  5. 11. The final stage of a small/medium star
  6. 13. A big star turns into this when it runs low on hydrogen
  7. 14. Planets + Star = ?
  8. 16. A giant rock that orbits a star
Down
  1. 1. an area in a solar system that is suitable for life
  2. 3. A ‘neighborhood’ of Galaxies
  3. 4. Shapes in the sky
  4. 7. This is constantly expanding
  5. 8. Stars, Stars, and more Stars
  6. 9. Big ball of burning gas
  7. 12. Theory that the universe was created by an explosion
  8. 15. the planet most people live on