Dead Galaxies, Salt Clouds & Earth-Mass Planet Finder
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Dead Galaxies, Salt Clouds & Earth-Mass Planet Finder
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(00:01:25) Salt Clouds on Pink Planet GJ504b
(00:02:17) AI Tool Finds Earth-Mass Planets
(00:03:01) Curiosity's Mount Sharp Rock Layers
(00:03:27) Solar Activity Watch
(00:03:58) What to Watch Next
The early universe is full of massive dead galaxies, and astronomers have long assumed supermassive black holes were to blame. JWST and ALMA have now changed that picture. Observing galaxy CRISTAL-02 — a massive system already dying less than a billion years after the Big Bang — researchers found the killer is the star formation itself. Powerful stellar winds are ejecting gas at twice the rate stars are forming, consuming the galaxy from within. Around forty percent of early compact galaxies underwent mergers, triggering intense star-burst episodes that drove these fatal winds. CRISTAL-02 is the clearest direct observational evidence yet for star-formation-driven quenching.
In a separate JWST result, the cold planetary-mass object GJ504b — roughly twenty-five Jupiter masses and sitting fifty-seven light-years away — has revealed unexpected salty clouds in its atmosphere. Salt had not been anticipated in cold, distant worlds like this, and the discovery broadens the range of chemistry scientists should expect in similar objects.
On the exoplanet detection front, a new open-source deep-learning tool called doppleriann is now publicly available. Trained on real solar spectra from the HARPS-N instrument, it pushes radial-velocity sensitivity down to around twenty-five centimetres per second — fine enough to resolve Earth-mass planetary signals previously buried in stellar noise.
Meanwhile, Curiosity is surveying distinct rock band formations on Mars's Mount Sharp, each layer encoding a different chapter of ancient Martian environmental history. Solar activity remains moderate with twelve B- and C-class flares in the past twenty-four hours, but a newly rotating active region in the southeast warrants close monitoring as its magnetic complexity becomes clear.
This episode includes AI-generated content.
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