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Astrophysicists Discover Superheated Galaxy Y1 from Early Universe

11/18/2025

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Summary

Story summary

Astronomers have identified Y1, a superheated galaxy that formed about 800 million years after the Big Bang.
Using the Atacama Large Millimeter/submillimeter Array (ALMA), researchers measured Y1's dust temperature at about -356°F (-180°C).
The galaxy forms stars at about 180 times the Milky Way's rate.
The findings suggest intense early star formation was common and may explain excess dust without older stars.

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Story summary

Astronomers have identified Y1, a superheated galaxy that formed about 800 million years after the Big Bang.
Using the Atacama Large Millimeter/submillimeter Array (ALMA), researchers measured Y1's dust temperature at about -356°F (-180°C).
The galaxy forms stars at about 180 times the Milky Way's rate.
The findings suggest intense early star formation was common and may explain excess dust without older stars.