Massive star clusters emerge faster from gas clouds, Webb and Hubble find
Updated
Updated · European Space Agency · May 6
Massive star clusters emerge faster from gas clouds, Webb and Hubble find
8 articles · Updated · European Space Agency · May 6
Studying nearly 9,000 young clusters in Messier 51, Messier 83, NGC 4449 and NGC 628, researchers found massive clusters clear natal gas in about five million years.
Less massive clusters emerged after seven to eight million years, giving heavier clusters an earlier role in stellar feedback that shapes how gas moves and stars form across galaxies.
The Nature Astronomy study says faster gas clearing also exposes protoplanetary discs sooner to ultraviolet radiation, potentially limiting planet growth and helping constrain star-formation simulations.
What is the secret to massive star clusters clearing their cosmic nurseries millions of years ahead of schedule?
How does a star cluster's size ultimately dictate the fate of its newborn planets?
Did giant star clusters single-handedly burn away the cosmic fog after the Big Bang?
The 2026 Breakthrough: Massive Star Clusters Disperse Gas Faster, Driving Galactic Evolution and Early Universe Reionization
Overview
A landmark 2026 study revealed that massive star clusters clear their natal gas in about 5 million years, much faster than lower-mass clusters that take 7-8 million years. This rapid gas dispersal allows massive clusters to emit intense ultraviolet light early, driving powerful stellar feedback that pushes away surrounding gas and regulates star formation in their host galaxies. The feedback efficiency depends on the initial gas density, with massive clusters forming in dense environments where radiation pressure quickly expels gas. This early feedback also contributed to cosmic reionization and shortens the time available for planet formation by exposing protoplanetary disks to harsh UV radiation sooner.