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
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Far-infrared light, associated with longer wavelengths than what even the James Webb Space Telescope can see, is emitted by cosmic dust that has absorbed starlight. Keith Cooper, Space.com, 17 Apr. 2025 Every April, as winter’s grip finally loosens and the nights grow a little warmer, Earth drifts through a centuries-old cloud of cosmic dust. Jake Parks, Discover Magazine, 11 Apr. 2025 From studies on the biggest and brightest galaxies, to the most distant, active supermassive black holes, and even analysis on cosmic dust and stellar evolution, JWST has contributed to many new perspectives on the early universe during its first two years of observation. Samantha Mathewson, Space.com, 13 Jan. 2025 Observing with X-rays, which can penetrate cosmic dust, offers a way around this problem. Carlyn Kranking, Smithsonian Magazine, 23 July 2024 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 24 Apr. 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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