These clouds may have been heated by their collapse in the early Universe, but in many galaxy clusters , the gas appears to be cooling. This Chandra Observatory x-ray image reveals a striking cooling flow in the central regions of the galaxy cluster cataloged as Abell 1795. At the very top of the filament is a large, x-ray bright galaxy. As it moved through the cluster gas cloud, the massive galaxy's gravitational influence seems to have created this cosmic wake of denser, cooling gas . Continuing to cool, the cluster gas will ultimately provide raw material to form future generations of stars.
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