Science ❯ Astrophysics

Mass Measurements

Galaxy Mass Direct Measurements

JWST Spectra Reveal Hidden Low-Mass Stars That Boost Early Galaxies' Masses

New analysis of JWST plus VLT spectra shows some massive early galaxies contain far more faint stars than previously measured.

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JWST Measures 50‑Million‑Solar‑Mass Black Hole That Outweighs Its Host