Rare astronomical event (8 letters) — Crossword Helper

Enter a clue or pattern or both:

The Clue

Rare astronomical event (8 letter answer)

The Answer

BLUEMOON

Tags

astronomical bluemoon eon event occasion occurrence rare seen seldom super

Notes

The answer BLUEMOON is so rare that it appears less than once every 2900 puzzles.

Related Clues

Eon
Rare occasion
Super-rare occurrence
Seldom-seen occurrence