Code Crossword

123456789
Across
  1. 3. Racism
  2. 7. Small importance
  3. 8. The study of stars
  4. 9. Scotland's national animal
Down
  1. 1. Stop an attack
  2. 2. More than one
  3. 4. Try out for a play
  4. 5. x+6=6x
  5. 6. If telescopes could be conjoined twins