cosmic dust


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

Example Sentences

Recent Examples on the Web But cosmic dust across the universe swirls together with gas to form stars, planets and the very building blocks of life. Ashley Strickland, CNN, 14 Mar. 2023 All of which are components found on cosmic dust. Joshua Hawkins, BGR, 15 Feb. 2022 Some cosmic dust particles are able to withstand supernovae and continue contributing to the universe’s overall dust amount—but researchers don’t fully understand how or why. Sarah Kuta, Smithsonian Magazine, 15 Mar. 2023 But either way, its final fate remains the same, written in the stars and planets yet to form from its generous gift of cosmic dust. Allison Parshall, Scientific American, 17 Mar. 2023 Astronomers also keep track of cosmic dust, tiny mineral grains that obscure the views of our optical telescopes. Elizabeth Preston, Discover Magazine, 26 Feb. 2015 As a result, Cassini was re-tasked to fly through these plumes several times, measuring their composition using instruments originally designed to sample cosmic dust and the outer atmosphere of Saturn’s much larger moon Titan. David Rothery, Discover Magazine, 27 Oct. 2015 That’s because Webb captured thousands of previously unseen young stars that, when viewed through other telescopes, were always obscured by cosmic dust. Sarah Kuta, Smithsonian Magazine, 7 Sep. 2022 Astronomers have long wondered if grains of cosmic dust can form in and escape from the harsh inner regions of violent stellar systems. Phil Plait, Scientific American, 25 Oct. 2022 See More

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'cosmic dust.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

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.” Dictionary, Merriam-Webster, Accessed 3 Jun. 2023.

Kids Definition

cosmic dust

: very fine particles of solid matter found in any part of the universe
Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!