9S3's space crossword!

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Across
  1. 2. These are used for TV communications and for looking at the universe.
  2. 4. This is the name for all of space!
  3. 7. Ours is called the Milky Way and contains about 100 000 000 000 stars!
  4. 8. An astronomer uses this to look at stars and planets.
  5. 9. We use this to find out about the universe. We can see visible _ _ _ _ _.
  6. 10. These reflect the sun's light and there are 8 in our solar system.
Down
  1. 1. These are used for mobile phone communications and for finding out how the universe started.
  2. 3. The sun is a _ _ _ _.
  3. 5. We look at this at night to see the stars and planets.
  4. 6. This is used in space to reflect microwaves for communications.