Review for Test 1--Unit 5.2

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Across
  1. 2. a group of galaxies
  2. 3. movement around its own axis
  3. 7. movement around the sun
  4. 10. formed by a star and the celestial bodies that orbit around it
  5. 12. a yellow dwarf star
  6. 13. orbit a star that is not the sun
  7. 16. measures the force of gravity acting on an object
  8. 17. brightness of a star
  9. 20. theory that proposes the origin of the universe
  10. 21. large, almost round object that moves around the sun, doesn’t have a clean orbit; has other objects such as asteroids and comets
  11. 22. bodies that orbit a planet or a dwarf planet
Down
  1. 1. group of stars that form shapes
  2. 4. everything that exists in space and time
  3. 5. a group of billions of stars united by gravity
  4. 6. a ring of frozen celestial objects located beyond Neptune
  5. 8. measures how much matter an object contains
  6. 9. a large celestial object that moves around a star
  7. 11. star that explodes or die
  8. 14. the distance light takes to travel in a year
  9. 15. force of attraction that an object exerts on others due to its mass
  10. 18. an elliptical, almost circular path
  11. 19. the science that studies the universe