Related Clues:

• Sky sight
• Astronomical sighting
• Theme of this puzzle
• Astronomer's sighting
• Hale-Bopp, e.g.
• Exploding star
• Stellar phenomenon
• Kind of star
• Deli order
• ___ Scotia
• Astral flareup
• Old Chevy model
• Kitchen cleanser
• Doomsday cause, maybe
• PBS offering