Astronomy

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Across
  1. 5. The sun is several_______years old.
  2. 6. The stars _____determines its color
  3. 8. ____stars are the coolest
  4. 10. Astronomers measure distance to the planets using _____ Units.
  5. 12. When a meteoroid passes through the Earth's surface it because a _____.
  6. 15. A piece of a meteor that lands on Earth is called a _______.
  7. 16. The sun is ______sized.
  8. 17. This holds the planets in place.
  9. 18. IIt takes eight _________for light to reach Earth
  10. 19. A _____is a ball of ice, dust, and gases that travels through space and orbits the sun.
Down
  1. 1. ______stars are the hottest.
  2. 2. Stars in a ______are far apart.
  3. 3. The _____has the greatest effect on the tides.
  4. 4. A ____is the distance between the stars.
  5. 7. The sun is a ____.
  6. 9. The sun is a ______star.
  7. 10. An _____is like a small planet in that it is rocky and orbits the sun
  8. 11. A _______forms when asteroids break up.
  9. 13. The stars in a _______are fairly close together.
  10. 14. Planets _____the light from the sun