#NASA, #Space, #astronomy, #διάστημα
Supernova 1987A: The Ring That Shouldn’t Exist — Now Glowing with Freshly Forged Dust38 years after the closest and brightest supernova in nearly 400 years detonated in the Large Magellanic Cloud, its corpse is doing something astronomers never expected: it’s quietly manufacturing mountains of solid dust, right where the star died.This tri-color masterpiece fuses three realms of light:Red: ALMA’s millimeter waves reveal cold, newly condensed dust grains packed in a dense equatorial ring — the smoking gun of solid-particle birth.
Green: Hubble’s visible light traces the delicate pearl necklace of gas that first lit up when the shockwave slammed into a ring of material the star had quietly shed thousands of years before it exploded. Blue: Chandra’s X-rays scream from the million-degree plasma where the blast is still plowing outward at 3,000 km/s. For decades we knew supernovae must be the cosmic factories that seed galaxies with the raw material of future planets — the carbon, silicon, and iron that one day become rocks, continents, and people. But actually catching them in the act? Impossible. The dust was always too cold, too hidden behind curtains of hot gas.Until ALMA looked.In that crimson glow lies the first direct proof: within less than four decades, the shredded guts of a dead star have already cooled enough to condense into microscopic solid grains — trillions of tons of them — concentrated exactly where theory predicted, inside the dense ring that survived the initial fireball.This is the moment the ashes of a star begin their long journey to become someone else’s world.November 28, 2025 — the day we finally watched a supernova forge the building blocks of planets in real time. Credit: ALMA (ESO/NAOJ/NRAO)/A. Angelich; Visible Light: NASA/ESA Hubble Space Telescope; X-ray: NASA Chandra X-Ray Observatory
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