Solar System and Beyond

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Across
  1. 3. model where the Earth was center
  2. 5. an object moves in a straight line unless another force acts upon it
  3. 6. all known objects in space
  4. 9. fusion of hydrogen atoms to create helium atoms in a star
  5. 10. model where the sun in the center
  6. 14. large heavenly bodies that revolve around a star
  7. 15. An explanation of the world around us
  8. 18. distance light travels in one year
  9. 19. our galaxy, where our solar system is found
Down
  1. 1. object with strong gravity, nothing escapes
  2. 2. a system with a sun at the center and planets and other objects in space
  3. 4. distance in relation to a specific point of reference
  4. 7. position of an object in relation to an identified/specific point
  5. 8. brilliant explosion occuring from a dying supergiant star
  6. 11. initial explosion that resulted in formation and expansion of the universe
  7. 12. of attraction that governs how objects in space interact with each other
  8. 13. grouping of stars that form a pinwheel with arms spiraling from the center
  9. 16. a natural body that revolves around a planet, also known as the moon
  10. 17. large cloud of gas and dust with immense volume