THE UNIVERSE

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Across
  1. 4. a chuck of ice, dust, and rock that moves around the sun
  2. 5. a rock that moves around the sun
  3. 7. one complete trip of the Earth around the sun
  4. 10. The tendency of a moving object to keep moving in a straight line
Down
  1. 1. It is the force of attraction between objects
  2. 2. a group of stars that make a pattern in the night sky
  3. 3. an object that makes its own energy, including heat and light
  4. 6. a complete spin on Earth´s axis
  5. 8. a natural or artificial object that circles another object in space
  6. 9. a very large group of billions of stars, ours is Milky Way