Findings:
- Nebula Award Finalists: 1975
- Trifid Nebula
- Lagoon Nebula
- Eskimo Nebula
- Rosette Nebula
- Nebula Award Finalists: 1965
- Nebula Award Finalists: 1966
- Nebula Award Finalists: 1967
- Nebula Award Finalists: 1968
- Nebula Award Finalists: 1969
- Nebula Award Finalists: 1970
- Nebula Award Finalists: 1971
- Nebula Award Finalists: 1972
- Nebula Award Finalists: 1973
- Nebula Award Finalists: 1974
- Saturn Nebula
- Nebula Award Finalists: 1976
- Nebula Award Finalists: 1977
- Nebula Award Finalists: 1978
- Nebula Award Finalists: 1979
- dark nebula
- Egg Nebula
- nebula ball
- Swan Nebula
- Omega Nebula
- The Space Alliance of the Pleasure Planet Nebula 71
- Nebula Class Starship
- Starflight II: Trade Routes of the Cloud Nebula
- Mitten Nebula
- Nebula Alert
- Time considered as a helix of semiprecious stones
- The Race for the Golden Helix
- Helix
- alpha helix
- Helix Code
- beta helix
- The Double Helix
- Honda Helix
- Ka-27 Helix
- helix (user)
- Soldier of Fortune II: Double Helix
- The Triple Helix
- double helix
- Hedera helix
- Helix angle
- nebula (user)
- Nebula
- Nebula award
- Reflection Nebula
- Emission Nebula
- Crab Nebula
- Orion Nebula
- Nebula Grandmaster
- Planetary nebula
- Ring Nebula
- Horsehead Nebula
- Dumbbell Nebula
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