[REVISION HISTORY]

JWST discoveries in the early universe and local cosmos

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2026-08-26 10:15 UTC → 2026-09-06 01:05 UTC · added ~~removed~~

Since late June 2026, JWST has delivered high-impact observations across cosmology, exoplanet atmospheres, and solar-system bodies. Key findings include the confirmation of the “magical line” in Abell 2744 and the detection of salt clouds on GJ 504b. In August 2026, research into the early universe’s “little red dots” evolved. Data identified a ‘Black Hole Star’ (MoM-BH-1*)—an object 100 billion times brighter than a normal star—which appears to be a supermassive black hole of roughly 100,000 solar masses enveloped in a dense hydrogen cocoon. This discovery, alongside a new census of the early universe, suggests galaxies formed earlier and grew faster than previous models predicted, though the ΛCDM cosmological framework remains intact. Further studies of the distant galaxy J0148-4214 revealed a unique triplet of active supermassive black holes. Mapping efforts have expanded significantly. Using the Cosmic Evolution Survey (COSMOS), astronomers produced a highly detailed map of the dark matter cosmic web, covering an area 2.5 times the size of a full moon. By analyzing light bending from approximately 800,000 galaxies, researchers confirmed that dark matter acts as “gravitational scaffolding” and has coexisted with visible matter since the early universe. ~~This high-resolution mapping, achieved through 255 hours of data collection, provides twice the sharpness of previous observatories.~~ Recent observations of local environments and planetary formation have also yielded breakthroughs. ~~The telescope~~ Using its Mid-Infrared Instrument (MIRI), astronomers identified dust and water molecules ~~and cosmic dust within~~ surrounding the ~~envelope of IRS 3, a massive~~ star ~~located~~ IRS 3 near Sagittarius ~~A*. Additionally, new infrared images~~ A*, demonstrating that such molecules can persist in high-radiation environments. In exoplanet research, JWST detected the spectral signature of heavy water (HDO) in the ~~NGC 2392 planetary nebula captured~~ atmosphere of WASP-39b, marking the first verification of water isotopologues outside our solar system. Additionally, a ~~Sun-like star expelling its outer layers. Finally, analysis~~ study of 72 protoplanetary disks ~~suggests~~ revealed that gas giant formation is ~~constrained by~~ a ~~limited timeframe, with~~ race against time; gas ~~depletion transitioning~~ is lost through distinct stages, moving from magnetic field-driven jets to ~~gentler~~ atomic ~~winds.~~ winds driven by photoevaporation, eventually closing the window for gas-rich planet formation.

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