SPACE

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Across
  1. 3. ATOMS
  2. 5. NEPTUNIAN
  3. 7. PHOBOS
  4. 8. HESPERUS
  5. 9. GALAXIES
Down
  1. 1. HALO
  2. 2. WANDERSTAR
  3. 3. ASTRO
  4. 4. STARSHIP
  5. 6. NEREID