The Conversation

Why do some galaxies stop making new stars?

Author: Michael J. I. Brown, Associate professor, Monash University

Spiral galaxy NGC 3953 is a veritable star making machine, but why do some galaxies stop forming new stars?NASA-Sloan Atlas

Galaxies are star-making machines, churning out new stars fuelled by cold gas collapsing under the force of gravity. Some galaxies can produce hundreds of new stars in a single year, and individual galaxies can contain many...

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