As scientists observed the galaxy using the Great Millimeter/Submillimeter band of Atacama, they understood why it stopped forming stars, and it turned out that it didn't waste all of the gas, but because most of its star-forming fuel simply threw out of the system when it merged with another galaxy.
When galaxy moves through the universe, sometimes it comes into contact with others. When it does, gravity draws each one of them to the other. In this process, they throw out the gas and the stars, leaving behind the streams of material. They are known as tide tails.
This is exactly what happened with the SDSS J1448+1010, but slightly different. The massive galaxy, which was born when the universe was about half its current age, almost completed the merger with another. In the course of the research, scientists discovered tidal tails that contained about half of the system's cold star-forming gas. In the end, astronomers discovered forced material that was 10 billion times larger than the Sun's mass. Scientists concluded that the merger had led to the end of the star formation and its death. Astronomers did not expect this.
So, so it's not yet clear how much of this cosmic "twisting rope" is common in the universe, nor is it clear how this process causes stars to stop being born in galaxy.
But the new discovery challenges long-standing theories about how star formation stops and the galaxy dies, and now scientists have the new challenge of finding more examples in the universe.
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