What is this Cloud of Gas Bigger than a Galaxy Doing all By Its Lonesome?

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What is this Cloud of Gas Bigger than a Galaxy Doing all By Its Lonesome?
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What is this Cloud of Gas Bigger than a Galaxy Doing all By Its Lonesome?

Astronomers have found a truly gigantic and fiercely hot cloud of gas floating near the edge of a galaxy cluster, and it’s blasting out X-rays.