The Final Frontier.

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Across
  1. 2. A small partitioned space, such as in a ship (7 letters)
  2. 3. A precious alloy of tin and lead with a grayish shine (6 letters)
  3. 6. The absence of radio signals or communication (11 letters)
  4. 8. The act of leaving one place to live in another (11 letters)
Down
  1. 1. A strong emotion of regretful longing (9 letters)
  2. 4. A transparent lamp, often carried by hand (7 letters)
  3. 5. Fixed amounts of commodities allowed during shortages (7 letters)
  4. 7. Thin and shiny layer, often on books (6 letters)