High-energy particle that moves almost as fast as light WSJ Crossword Clue
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The most common and recent 9-letter answer for "High-energy particle that moves almost as fast as light" is COSMICRAY.
The clue describes a 'cosmic ray,' which is a high-energy particle originating from outer space that travels at nearly the speed of light. The word 'cosmic' refers to its origin in the cosmos, while 'ray' suggests its nature as a stream of particles.
This clue was last seen in the WSJ Crossword on November 24, 2025.
A cosmic ray is a highly energetic atomic nucleus or other particle that travels through space at nearly the speed of light.
The clue “High-energy particle that moves almost as fast as light” is a classic crossword staple, frequently appearing in puzzles like the WSJ crossword. For the puzzle dated November 24 2025, the definitive 9-letter answer is: COSMICRAY.
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