Astronomy

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Across
  1. 6. the star at the center of the solar system
  2. 7. It emits its own radiation through nuclear fusion
  3. 8. it did not originate on Earth
  4. 9. first rocket to land on the moon
  5. 12. It moves in an elliptical orbit around a star
  6. 13. our home planet
  7. 16. balls of ice and rock that orbit the
  8. 17. My name is
  9. 18. My teacher calls himself
Down
  1. 1. the largest planet in solar system
  2. 2. it causes two bodies to attract each other
  3. 3. the explosion of a star
  4. 4. It orbits a planet or star.
  5. 5. small planetary bodies orbiting the sun
  6. 9. protons=(-)charge, electrons=(+) charge
  7. 10. the year the first rocket landed on the moon
  8. 11. a large grouping of stars
  9. 14. it makes distant objects appear nearer
  10. 15. another name for the moon
  11. 16. stars that make an imaginary picture