Science For Sleep | Every Type of Cosmic Dust in the Universe

Now on Spotify 🎧 Listen here: https://open.spotify.com/show/033FAXP... Between the stars, countless microscopic grains drift silently through the darkness. In this episode, every type of cosmic dust in the universe becomes a gentle journey into the tiny particles that help build planets, obscure galaxies, and carry the chemical ingredients of future worlds. We explore silicate dust forged from minerals containing silicon and oxygen, carbon-rich grains produced around aging stars, and tiny particles containing metals, ice, and complex organic molecules. Some grains form in the cooling atmospheres of dying stars, while others are blasted into space by supernovae or grow inside the cold clouds between stars. There is interstellar dust scattered throughout galaxies, interplanetary dust drifting between planets, and ancient presolar grains that existed before our own Solar System was born. Around young stars, enormous dusty disks provide the raw material from which asteroids, moons, and planets can slowly emerge. Cosmic dust may be almost unimaginably small, but its influence stretches across the universe. It absorbs visible starlight and releases that energy in infrared wavelengths, helps gas clouds cool and collapse into new stars, and provides surfaces where surprisingly complex chemistry can take place. Let this gentle exploration of every type of cosmic dust in the universe settle softly into your thoughts. Breathe slowly. Imagine microscopic grains drifting between the stars for millions of years, eventually becoming part of a cloud, a planet, or perhaps even something alive. And rest in the stillness of a universe where some of its smallest particles quietly help create its largest worlds. Sources: B. T. Draine — Interstellar Dust Grains — https://www.annualreviews.org/content... Schneider & Maiolino — The Formation and Cosmic Evolution of Dust in the Early Universe — https://link.springer.com/article/10.... Testi et al. — Dust Evolution in Protoplanetary Disks — https://arxiv.org/abs/1402.1354 NASA — Stardust Mission — https://science.nasa.gov/mission/star... Ménard et al. — Galaxy–Dust Correlations and Intergalactic Dust — https://academic.oup.com/mnras/articl...