Vocabulary Review

1234567891011121314151617181920
Across
  1. 7. a large collection of stars, gas, and dust held together by gravity
  2. 11. the distance light travels in one year
  3. 12. a group of stars that form a pattern in the sky
  4. 14. all existing matter and space
  5. 15. the path an object takes as it moves around another object
  6. 17. a large, round object that orbits a star
  7. 18. eclipse when the moon blocks all or part of the sun’s light
  8. 20. a dark area made when light is blocked
Down
  1. 1. brightness how bright a star appears compared to other stars
  2. 2. a period of the year with certain weather patterns caused by Earth’s tilt and revolution
  3. 3. the force that pulls objects toward each other
  4. 4. cycle the stages an object goes through from beginning to end
  5. 5. a star or constellation that is always visible in the sky and never sets
  6. 6. to bounce back light
  7. 8. a large ball of hot gas that produces its own heat and light
  8. 9. system a system that includes a star and all the objects that orbit it
  9. 10. spinning on an axis
  10. 11. eclipse an event that occurs when Earth’s shadow falls on the moon
  11. 13. an imaginary line through the center of an object that it spins around
  12. 16. the repeating pattern of change in the moon’s appearance
  13. 19. one complete trip around another object