cosmic dust

noun

: very fine particles of solid matter found in any part of the universe

Examples of cosmic dust in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Most cosmic dust exhibits random atomic structures, and appears like soot. Andrew Paul, Popular Science, 27 Aug. 2025 Astronomers can study zodiacal light to map the distributions and possible origins of cosmic dust, revealing further insights about the processes happening in our solar system. Kenna Hughes-Castleberry, Space.com, 15 Aug. 2025 It’s made up of billions of stars, massive clouds of gas and cosmic dust. Valerie Mesa, People.com, 20 May 2025 The James Webb Space Telescope's power allowed the team to peer through cosmic dust to see far enough into the past to observe galaxies during the cosmic noon, 10 billion years ago. Ross Rosenfeld, MSNBC Newsweek, 23 Apr. 2025 See All Example Sentences for cosmic dust

Word History

First Known Use

1881, in the meaning defined above

Time Traveler
The first known use of cosmic dust was in 1881

Cite this Entry

“Cosmic dust.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/cosmic%20dust. Accessed 9 Sep. 2025.

Kids Definition

cosmic dust

noun
: very fine particles of solid matter found in any part of the universe
Last Updated: - Updated example sentences
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