Enter a clue or pattern or both:
The Clue
___ cloud (solar system outlier) (4 letter answer)
The Answer
OORT
Tags
Notes
The answer OORT is rarely seen, appearing only about once every 1800 puzzles.
Related Clues
Astronomy's ___ cloud
Kind of cloud
___ cloud (astronomical sighting)
___ cloud (cosmic debris)
Definition
OORT as a noun:
1. (Oort, Jan Hendrix Oort) = Dutch astronomer who proved that the galaxy is rotating and proposed the existence of the Oort cloud (1900-1992)