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Oldest "Dead" Galaxy Discovered, Reshaping Cosmic Understanding

4/3/2025

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Summary

Story summary

Astronomers at the University of Geneva have unveiled RUBIES-UDS-QG-z7, the oldest "dead" galaxy, which stopped forming stars a mere 700 million years post-Big Bang. This groundbreaking discovery reveals that massive quiescent galaxies are 100 times more prevalent than previously thought, urging a profound reassessment of our understanding of galaxy formation in the early Universe.

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Story summary

Astronomers at the University of Geneva have unveiled RUBIES-UDS-QG-z7, the oldest "dead" galaxy, which stopped forming stars a mere 700 million years post-Big Bang. This groundbreaking discovery reveals that massive quiescent galaxies are 100 times more prevalent than previously thought, urging a profound reassessment of our understanding of galaxy formation in the early Universe.