: very fine particles of solid matter found in any part of the universe
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Within the galactic structure are prominent central dark lanes of cosmic dust.—Robert Lea, Space.com, 3 Mar. 2026 Building up a database To make the cosmic dust, Losurdo started with nitrogen, carbon dioxide and acetylene — a colorless, odorless gas made up of carbon and hydrogen.—Jacopo Prisco, CNN Money, 6 Feb. 2026 Glowing gas and dust NGC 2264 contains vast clouds of hydrogen gas mixed with thick cosmic dust.—Aamir Khollam, Interesting Engineering, 25 Dec. 2025 In this way, cosmic dust behaves as a very efficient absorber of visible light, is only lightly absorbed by near-infrared light, and is practically perfectly transparent to mid-infrared (and longer) wavelengths of light.—Ethan Siegel, Big Think, 12 Sep. 2025 See All Example Sentences for cosmic dust