National Science Fiction Day

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Across
  1. 2. Laserbeam
  2. 4. Lightyear
  3. 5. Martian
  4. 6. Metropolis
  5. 7. Supernova
Down
  1. 1. Timewarp
  2. 3. Starfield
  3. 4. Alienworld
  4. 5. Asteroid
  5. 6. Starship