New findings explain the Phoenix cluster's mysterious starburst. Data confirm the cluster is actively cooling and able to generate a huge amount of stellar fuel on its own. The core of a massive ...

The faraway Phoenix galaxy cluster may be the biggest and brightest such structure ever discovered, and it's forming stars at an unprecedented rate, scientists announced today (Aug. 15). Here's a ...

The core of the Phoenix cluster is shown across the whole electromagnetic spectrum. The bright purples represent X-rays produced by the hot gas, and the dashed purple outlines show regions where this ...