Unit 7 Vocabulary

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Across
  1. 8. Star explosion/collision
  2. 11. Spiral galaxy that holds Earth
  3. 13. Round to oval galaxy shapes
  4. 14. Fact or information
Down
  1. 1. Space vacuum
  2. 2. International system of units
  3. 3. Galaxy shaped as a spiral
  4. 4. A unit of measurement used in the solar system
  5. 5. Force attraction to the center
  6. 6. (9.46 x 10^12 km)
  7. 7. All of matter
  8. 8. An explanation of natural occurrences
  9. 9. A cloud of gas and dust in space
  10. 10. A group of planets that revolve around a star
  11. 12. Stars, gas, and dust held by gravitational attraction