European Southern Observatory

new-analysis-reveals-faster-expanding-universe-heightening-hubble-tension

New Analysis Reveals Faster-Expanding Universe, Heightening Hubble Tension

Editorial 7 December, 2025

A recent analysis of quasar time delays has intensified the ongoing debate surrounding the...

4most-telescope-captures-first-light-ushering-in-new-era-of-astronomy

4MOST Telescope Captures First Light, Ushering in New Era of Astronomy

Editorial 26 October, 2025

On October 18, 2025, the **4-meter Multi-Object Spectroscopic Telescope (4MOST)** achieved a significant milestone...