Astronomers have discovered the oldest “dead” galaxy ever observed

Astronomers have observed a galaxy that suddenly stopped forming new stars more than 13 billion years ago.

Using the James Webb Space Telescope, a team of astronomers led by the University of Cambridge has discovered a galaxy that actually died when the universe was only 700 million years old. It's about to For the oldest such galaxy ever observed.

It seems that this galaxy lived fast and died young: Star formation occurred quickly and stopped almost as quickly, which is unexpected for such an early stage of the universe's evolution. In particular, the galaxy experienced a short and intense phase of star formation between 30 and 90 million years ago. But 10 to 20 million years before the point in time observed by Webb, star formation suddenly stopped.

but, It is not clear whether this galactic state is temporary or permanent What caused it to stop forming new stars? Astronomers say that although it appeared dead at the time of sighting, it is possible that in the 13 billion years since then, this galaxy may have come back to life and started forming new stars again.

The research results, published in the journal Nature, could help astronomers understand how and why galaxies stop forming new stars, and whether the factors that influence star formation have changed over billions of years. Source RES-EMP

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