Possible Questions:
- Theme of this puzzle
- Old Mercury model
- Obtained
- Heavenly body
- Celestial body
- Astronomer's sighting
- One of Santa's team
- One of Santa's reindeer
- Sky sight
- Celestial streaker
- Telescope sight
- Member of Santa's team
- Celestial sight
- Under-the-sink brand
- Halley's ___
- Dancer's teammate
- Heavenly streaker
- Cupid's teammate
- Cleanser brand
- Astronomer's find
- Sky phenomenon
- Halley's, for one
- Celestial sighting
- A sleigh puller
- Tailed orbiter
- Streaker in space
- Stellar sight
- Space sighting
- Sky body
- Doomsday cause, maybe
- Celestial firework
- Bon Ami competitor
- Traveler with a tail
- Streaker with a tail
- Streaker with a big tail
- Sleighmate of Cupid
- Sky traveler
- Rival of Ajax
- Orbiter with a tail
- Kohoutek, e.g.
- Halley's namesake
- Halley's find
- Halley's discovery
- Halley's __
- Hale-Bopp, for one
- Hale-Bopp, e.g.
- Flier with Cupid
- Cupid neighbor?
- Cleanser or a reindeer
- Christmas reindeer
- Christmas flier
- Celestial body with a tail
- Bad omen, perhaps
- Vixen teammate
- Threat in "Deep Impact"
- This has a fuzzy head and a long tail
- Sungrazer, e.g.
- Streaker seen at night
- Streaker in the night sky
- Sleigh-puller of note
- Sky blazer
- Rare night sight
- Periodic visitor
- Oort cloud object
- One of St. Nick's team
- One of Santa's sleigh team
- Occasional sky visitor
- Object with a tail
- Night sky streaker
- Member of the Donner party?
- Member of Bill Haley's band
- Long-tailed body
- Kohoutek, for one
- Kohoutek or Halley's
- Kitchen cleanser
- It reaches aphelion
- High-flying reindeer
- Heavenly passer-by
- Heavenly body with a tail
- Halley's, for example
- Halley's, e.g.
- Halley's sighting
- Halley's or Encke's ___
- Halley's __ (celestial visitor)
- Halley observation
- Halley discovery
- Halley discovered one
- Finish last on "Jeopardy!"
- Deep Impact's target
- December night sight
- Dasher's teammate
- Dancer's teammate?
- Dancer's sidekick
- Dancer's peer
- Cupid's yokemate
- Cupid's sleighmate
- Cupid's mate
- Cupid's friend
- Cleanser with the old slogan "Nothing can hold a can to ..."
- Cleaning brand
- Celestial object with a tail
- Body with a fuzzy head
- Bill Haley bandmate
- Astronomer's observation
- 2013's ISON, for one
- "Sungrazing" object
- "Full House" dog
- "Deep Impact" menace