The oldest “dead” galaxy known has been discovered

Astronomers believe that star formation can be slowed or stopped by various factors, all of which deprive the galaxy of the gas needed to form new stars.
“Internal factors, such as a supermassive black hole or feedback from star formation, can push gas out of the galaxy, rapidly suppressing star formation. On the other hand, gas can be consumed very quickly, and if it does not flow from the galaxy’s neighbourhood in a timely manner, it will also lead to its death,” the authors of the discovery explained.