cosmic dust


Definition of cosmic dust

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

Examples of cosmic dust in a Sentence

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The three concluded that there was a strong possibility that the signal could have been generated by cosmic dust in the galactic foreground rather than by gravitational waves. Peter Byrne, Quanta Magazine, "A Bold Critic of the Big Bang’s ‘Smoking Gun’," 3 July 2014 The search effort is the brainchild of Marc Fries, NASA curator of cosmic dust, who has set up many meteorite hunts in the past. Jason Daley, Smithsonian, "A Research Ship Is Hunting Meteorite Fragments Off the Coast of Washington," 4 July 2018 As Cassini skirted the E ring’s edge, some of its particles collided with an onboard instrument designed specifically to study cosmic dust and return information about its ingredients. National Geographic, "Right Stuff for Life Found on Small Saturn Moon," 27 June 2018 But Marc Fries, a planetary scientist who curates the cosmic dust collection at NASA Johnson Space Center, takes a more skeptical view. Adam Mann, Scientific American, "Curiosity Rover Uncovers Long-Sought Organic Materials on Martian Surface," 7 June 2018 But no one could tell whether the gas was a byproduct of microbial life, the result of geological reactions or a side effect of meteoroids and cosmic dust raining down on the planet. Robert Lee Hotz, WSJ, "Mars Rover Curiosity Finds More Clues to the Potential for Life," 7 June 2018 The light show happens as Earth passes through the cosmic dust trail of the comet that last passed by in 1986 and won’t be back until 2061. Richard Tribou,, "Look up this weekend for Eta Aquarid meteor shower," 4 May 2018 This cosmic dust was produced through violent collisions between asteroids, comets, and primordial planets billions of years in the past. National Geographic, "This Week’s Night Sky: See Mercury Take Flight," 4 Apr. 2016

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'cosmic dust.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of cosmic dust

1881, in the meaning defined above

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The first known use of cosmic dust was in 1881

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