A Distant Galaxy Dies as Astronomers Watch

A Distant Galaxy Dies as Astronomers Watch

Galaxies die when the stars that live in them stop forming. Now, for the first time, astronomers have witnessed this phenomenon in a distant galaxy.
Scientists were able to glimpse a galaxy as it ejected almost half of the gas it uses to form stars. They captured this rare observation using the Atacama Large Millimeter/submillimeter Array of telescopes in Chile.
The light from this galaxy, known as ID2299, has taken about nine billion years to reach Earth. That means astronomers are essentially observing how it appeared when the universe was only 4.5 billion years old (it’s now an estimated 14 billion years old).
The ID2299 galaxy is losing 10,000 suns-worth of gas per year, which is diminishing the fuel it needs to form stars by removing 46% of the galaxy’s total cold gas so far.

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A Distant Galaxy Dies as Astronomers Watch

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Galaxies die when the stars that live in them stop forming. Now, for the first time, astronomers have witnessed this phenomenon in a distant galaxy. Scientists were able to glimpse a galaxy as it ejected almost half of the gas it uses to form stars. They captured this rare observation using the Atacama Large Millimeter/submillimeter…

Galaxies die when the stars that live in them stop forming. Now, for the first time, astronomers have witnessed this phenomenon in a distant galaxy. Scientists were able to glimpse a galaxy as it ejected almost half of the gas it uses to form stars. They captured this rare observation using the Atacama Large Millimeter/submillimeter…

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