Solar System and Astronomy

Edit Answers
1234567891011121314151617181920212223242526272829303132333435
Across
  1. 2. the planets nearest the sun have the _______ revolution periods
  2. 6. a small rocky body in space, typically smaller than an asteroid
  3. 9. a natural satellite that revolves around a planet
  4. 10. instrument used for seeing stars and planets clearly
  5. 11. the distance between planets ________ after Mars
  6. 15. to travel around another object, like the planets around the sun
  7. 16. the number of stars in our solar system
  8. 17. the inner and outer planets are separated by the asteroid _____
  9. 21. a person who travels into space
  10. 22. the average distance from the center of the sun to the center of the earth (about 156 million km)
  11. 24. the star at the center of our solar system
  12. 26. a ball of superheated gas that undergoes nuclear fusion
  13. 27. one full trip around the sun
  14. 29. the coldest planet
  15. 31. the distance light travels in one year (9.5 trillion km)
  16. 33. the planets farthest from the sun have the most _____
  17. 34. planet tilted on its side
  18. 35. also known as the North Star
Down
  1. 1. a group of stars that form a pattern
  2. 3. the largest planet in the solar system, big red spot
  3. 4. a rocky body in space that orbits around the sun
  4. 5. the warmest planet, also very cloudy
  5. 6. rust makes this planet look reddish, the Persistence was sent there
  6. 7. an object that objects the sun and has enough gravity to become rounded and has cleared its orbital path
  7. 8. a loose ball of ice and dust that revolves around the sun with a long, narrow orbit
  8. 12. all _______ come from stars
  9. 13. tendency of an object to remain in constant motion, prevents planets from falling into the sun
  10. 14. a system with a star and planets and other objects revolving around it
  11. 15. to spin or turn on an axis
  12. 18. because it has not cleared its orbit pluto is now considered a ______ planet
  13. 19. planet known for its extensive ring system
  14. 20. the outer gas giants all have _____ systems around them
  15. 23. a person who studies the stars and other space objects
  16. 25. American space program that launches missions to space
  17. 28. the only planet known to support life, lots of liquid water
  18. 30. the closest planet to the sun
  19. 32. the force that keeps planets in orbit
  20. 35. dwarf planet with two moons