A new study led by Yale University astronomers tells the story of a galaxy that ran out of gas. It’s a story as old as the universe itself: A galaxy is born, brimming with new stars, its spiral arms stretching and curving. But then it runs into trouble, veering too close to the center of a nearby galaxy cluster. The surrounding cluster begins to siphon off the galaxy’s star-making gas, until it loses its spiral arms and becomes a dead relic.
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