The Final Pulse of Signal-9.

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Across
  1. 1. Type of tree where the rain fell in the audio recording
  2. 6. Essential thing Kael realized was worth saving besides power
  3. 9. Moon near which the derelict probe was floating
  4. 10. Main profession or role of Kael on the space station
Down
  1. 2. Planet whose neon rings flickered outside the dome
  2. 3. Thick gas forming the haze outside the observation dome
  3. 4. Format of the signal code broadcasted by the probe
  4. 5. Name of the lonely engineer stationed at Outpost Delta
  5. 7. Name of the outpost station where Kael is stationed
  6. 8. Type of file containing the sound of falling rain