THE UNIVERSE CROSSWORD PUZZLE

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Across
  1. 4. THE SCIENTIFIC STUDY OF THE STARS AND PLANETS
  2. 5. ARRIVE AT A PLACE
  3. 6. the whole of space and everything in it , including the planets and stars .
Down
  1. 1. an object that moves round a bigger object in
  2. 2. ABOUT
  3. 3. not easy to believe because it is very improbable
  4. 5. go around s.th in a circle