Spacey Space Spacing

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Across
  1. 5. around twice as far from the sun as Saturn
  2. 6. is the measurement of the amount of matter, or stuff in an object
  3. 8. a ratio of the size of a real object to the size of a model of that object
  4. 9. Gravitational Force is measured with this unit
  5. 13. rocky planet that has about half the diameter as Earth
  6. 14. rocky planet closet to the sun
  7. 15. reason for the seasons
  8. 16. causes objects to be pulled toward each other
  9. 17. Over 30 times farther from the sun than Earth
  10. 18. rocky planet that is hottest
Down
  1. 1. is the imaginary line passing through Earth’s North Pole and South Pole
  2. 2. the amount of gravitational pull between two objects
  3. 3. is when the Moon passes into Earth’s shadow
  4. 4. rocky planet with a 23.5 degree tilt that causes seasons
  5. 6. different shapes of the Moon visible from Earth
  6. 7. is when the Moon passes directly between Earth and the Sun
  7. 10. Almost 10 au from the sun
  8. 11. is a scientist who studies objects and events beyond Earth’s atmosphere
  9. 12. biggest planet