Sample of non-star-forming galaxies from the COSMOS survey

This image shows 20 of the quenched galaxies — galaxies that are no longer forming stars — seen in the Hubble COSMOS observations. Each galaxy is identified by a crosshair at the centre of each frame.  

Quenched galaxies in the distant Universe are much smaller than those seen nearby. It was thought that these small galaxies merged with other smaller, gas-free galaxies to grow bigger, but it turns out that larger galaxies were "switching off" at later times and adding their numbers to those of their smaller and older siblings, giving the mistaken impression of individual galaxy growth over time.

Credit:

NASA, ESA, M. Carollo (ETH Zurich)

About the Image

Id:heic1313a
Type:Observation
Release date:1 August 2013, 15:00
Related releases:heic1313
Size:5519 x 3297 px

About the Object

Name:COSMOS FIELD
Type:• Early Universe : Cosmology : Morphology : Deep Field
• X - Cosmology Images/Videos


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