Giant galaxies die from the inside out: Star formation shuts down in the centers of elliptical galaxies first

Astronomers have shown for the first time how star formation in "dead" galaxies sputtered out billions of years ago. Astronomers have revealed that three billion years after the Big Bang, these galaxies still made stars on their outskirts, but no longer in their interiors. The quenching of star formation seems to have started in the cores of the galaxies and then spread to the outer parts.

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