Science 9 - Space - Early views and our solar system

12345678910111213141516171819
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