JWST COSMOS-Web Lensing Map and Dark Galaxy CDG-2 Sharpen Dark Matter Evidence

JWST's COSMOS-Web weak-lensing map (2026) traces dark-matter filaments and faint groups at 1 arcminute resolution; CDG-2 in Perseus, found from four globular clusters with Hubble, Euclid and Subaru, appears about 99% dark.

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