Space stuff

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Across
  1. 3. the grey object that orbits around the earth.
  2. 4. to measure something.
  3. 5. a demonstration of what something looks like.
  4. 8. the action of lighting something up so it can be visible.
Down
  1. 1. something that does the same thing over and over again.
  2. 2. different ways the moon can be illuminated by the sun.
  3. 6. the motion of an object rotating around another object.
  4. 7. the giant ball of gas that lights up and keeps our solar system together.