660-733 Astronomy

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Across
  1. 3. Round pits caused by meteoroids. 681
  2. 5. Only planet tilted on its side.
  3. 7. A model of the universe with the Sun at the center. 702
  4. 10. Force of gravity on an object. 667
  5. 12. A spacecraft that carries scientific instruments, not humans. 691
  6. 13. Areas of gas on the Sun's surface that are cooler. 708
  7. 15. A dirty snowball in space. 731
  8. 17. The highest tide. 677
  9. 18. You can see the entire side of the moon. 673
  10. 23. Sixth planet in the Solar system.
  11. 24. The spinning of Earth on its axis. 661
  12. 27. Last planet in the Solar system.
  13. 28. Most important tool for the growth of astronomy. 680
  14. 29. Any object that revolves around another object. 688
  15. 31. The outer planets are made mostly of this. 721
  16. 33. The inner layer of the Sun's atmosphere. 708
  17. 35. When the moon appears to be growing. 672
  18. 36. Hottest planet in the Solar system.
  19. 39. the study of the moon, stars, and other objects in space. 660
  20. 41. Group of missions that landed humans on the Moon. 689
  21. 42. Fourth planet from the Sun.
  22. 43. The Earth has seasons because its axis is __ 662
  23. 44. Closest planet to the Sun.
Down
  1. 1. A device that expels gas to move in the opposite direction. 684
  2. 2. Attractive force between objects. 666
  3. 4. Largest planet in the Solar system.
  4. 6. Rocky objects in space. 732
  5. 8. The oval shape of orbits discovered by Kepler. 703
  6. 9. The lowest tide. 677
  7. 11. The longest or shortest day of the year. 663
  8. 14. Tendency of an object to resist a change in motion. 668
  9. 16. The day that the Sun is directly over head at the equator. 665
  10. 17. Eruptions from the Sun's surface. 710
  11. 19. The movement of one object around another. 661
  12. 20. When the moon appears to be shrinking. 673
  13. 21. Process in the Sun's core where hydrogen join to make helium. 707
  14. 22. A model of the universe with Earth at the center. 701
  15. 25. When the Moon or Earth cast a shadow on one another. 673
  16. 26. Rocky planets are called this. 712
  17. 28. The rise and fall of ocean water from the Moon and Sun's gravity. 676
  18. 30. the velocity a rocket must reach to fly beyond a planet's gravity 685
  19. 32. Amount of matter in an object. 667
  20. 34. The path of revolution. 661
  21. 37. Seas on the moon. 681
  22. 38. The outer layer of the Sun's atmosphere. 708
  23. 40. An asteroid in our atmosphere. 733