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Galaxies Cool, Star Formation Declines After 10 Billion Years

11/11/2025

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Summary

Story summary

The European Space Agency's Euclid and Herschel telescopes show galaxies have cooled and star formation declined over the past 10 billion years.
A team of 175 researchers analyzed data from 2.6 million galaxies and found about 10 kelvin drop.
The cooling correlates with reduced star formation, suggesting the universe's peak growth may be over.
The findings imply galaxies exhaust their star-forming materials, signaling a long-term trend toward a quenched universe.

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Story summary

The European Space Agency's Euclid and Herschel telescopes show galaxies have cooled and star formation declined over the past 10 billion years.
A team of 175 researchers analyzed data from 2.6 million galaxies and found about 10 kelvin drop.
The cooling correlates with reduced star formation, suggesting the universe's peak growth may be over.
The findings imply galaxies exhaust their star-forming materials, signaling a long-term trend toward a quenched universe.