Related Clues:

• Celestial radio source
• Crab __
• There's no escaping it
• Kohoutek, e.g.
• Show in outer space?
• PBS science program
• High-flying reindeer
• Gassy cloud
• Celestial flasher
• Halley's __
• Star with potential
• See 1 Across
• Streaker in space
• PBS staple
• Dasher's teammate