EU Astronomy review

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Across
  1. 2. the attractional force between two objects. What keeps us on earth.
  2. 4. what fuels a star and makes the light and energy
  3. 7. a streak of light seen when a space rock enters earth's atmosphere and burns up
  4. 10. a rocky object orbiting the sun between jupiter and mars
  5. 11. earth spinning on its axis giving us day and night.
  6. 12. the cyclic rise and fall of local sea level due to the moon's gravity.
  7. 13. how bright a star is and how much energy it gives off.
  8. 16. a chunk of ice and rock orbiting the outer solar system near the sun
  9. 17. earth spins on its
Down
  1. 1. a cloud of dust and gas in space.
  2. 3. earth orbiting the sun giving us a year.
  3. 5. the degree of ovalness of a celestial body's orbit.
  4. 6. a model where the earth is in the center of the universe.
  5. 8. an oval
  6. 9. a ball of gas that is fueled by nuclear fusion.
  7. 14. caused by the tilt of earth's axis and the revolution around the sun.
  8. 15. a model where the sun is in the center of our solar system.