Young galaxies are flat, but old ones are more blobby

A new survey precisely links the shape of a galaxy to the ages of its stars

SHOWING THEIR YEARS  Flat spiral galaxies like NGC 1055 (left) have more ordered and younger stars than blobby, spherical galaxies like IC 2006 (right), a new survey shows. 

From left to right: ESO; Hubble/ESA and NASA

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