Friday, November 13, 2026

Dense Galaxy Clusters Foster Mechanisms That Throttle Star Formation

This is an image of the large-scale structure of the Universe from the Illustris simulation. Galaxy clusters are situated on the filaments in the image, and some of those clusters form extremely dense environments. In new research, astronomers examined one particularly dense galaxy cluster at the intersection of filaments like these to measure the star-forming gas there, and to try to understand what forces throttled the Universe's star formation rate after the Cosmic Noon. Image Credit: Illustris Collaboration.

The Cosmic Noon was when the Universe's Stelliferous Era Began, and star formation was prodigious during that epoch. But since then, star formation has slowed to a relative crawl, despite the fact that we can watch them forming in regions throughout the Milky Way. What happened to the hydrogen gas that forms stars? New research found clues in a particulary dense galaxy cluster.



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