Overview

• A gravitationally lensed galaxy nicknamed “Uvas Cósmicas” has been imaged at 930 million years after the Big Bang, revealing at least 15 massive stellar clusters and challenging models of uniform early disks.
• JWST data identified compact proto-globular clusters forming roughly 440 million years post-Big Bang, implying an accelerated in-situ assembly of dense stellar systems.
• Astronomers reported A2744-GDSp-z4 as a mature spiral galaxy 839 million years after the Big Bang with 14 billion solar masses and a 32,000-light-year disk, defying gradual-growth theories.
• MIRI’s August 2024 detection of a giant exoplanet orbiting Alpha Centauri A was accepted in ApJ Letters but went unseen in Webb’s February and April 2025 visits, leaving the candidate provisional.
• An isolated report of a new “Planet Nine” beyond Neptune remains uncorroborated, underscoring the need for spectroscopic and multi-observatory verification of Webb’s most surprising discoveries.