UNIVERSE VOCABULARY

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Across
  1. 3. an object that orbits the Sun, is round, and has a clear neighborhood
  2. 5. all existing matter and space
  3. 7. an orbiting object used to collect data
  4. 8. weak tide that occurs when the Sun, Moon, and Earth form a right angle
  5. 10. a giant cloud of gas and dust that forms the stars and planets
  6. 13. The theory that the universe rapidly expanded from one central point
  7. 15. tool used to analyze the composition and motion of stars
  8. 17. when an object contains a lot of matter for its size
  9. 18. a luminous ball of hydrogen gas
Down
  1. 1. the joining of two atoms
  2. 2. a crewless object used to safely explore outer space
  3. 4. the daily rise and fall of coastal water
  4. 6. tool used to view distant objects
  5. 9. the amount of matter in an object
  6. 11. billions of stars, gas, and dust held together by gravity
  7. 12. strong tide that occurs when the Sun, Moon, and Earth align
  8. 14. pull towards all objects that have mass
  9. 16. when the wavelength of the light increases showing that the object is moving farther away