Science 9 - Space - Early views and our solar system

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Across
  1. 3. An astronomical tool that measured nighttime hours
  2. 4. Created when large stars explode. Not even light can escape it's gravity
  3. 6. When a massive star explodes it is called a ______
  4. 10. The model of our solar system where the sun is the center
  5. 11. A glowing ball of burning hydrogen gas and plasma
  6. 13. Kepler realized that planets have _____ orbits
  7. 16. A space rock that has no specific orbit
  8. 17. A telescope that uses lenses is a _____ telescope
  9. 18. a cloud of dust and gas where stars are born
  10. 19. A large space rock found between the inner and outer planets
Down
  1. 1. A space rock that has entered the Earth's atmosphere
  2. 2. The early model of the solar system where earth was believed to be the center
  3. 3. A space rock that has hit the earth
  4. 5. An astronomical tool that measured time during the day
  5. 7. When a smaller star dies it turns into this object
  6. 8. A telescope that uses mirrors is a _____ telescope
  7. 9. The planets made mostly of gases are called _______ planets
  8. 12. When a star begins to swell and expand is called a _____
  9. 14. The planets closest to the sun are called _______ planets
  10. 15. An object made of ice and rock that has a tail