Gigantic Wave Discovered in Perseus Galaxy Cluster
 
 
 
A wave spanning 200,000 light-years is rolling through the Perseus galaxy cluster, according to observations from NASA's Chandra X-ray Observatory coupled with a computer simulation. The simulation shows the gravitational disturbance resulting from the distant flyby of a galaxy cluster about a tenth the mass of the Perseus cluster. The event causes cooler gas at the heart of the Perseus cluster to form a vast expanding spiral, which ultimately forms giant waves lasting hundreds of millions of years at its periphery. Merger events like this are thought to occur as often as every three to four billion years in clusters like Perseus.
 
Credit: NASA's Goddard Space Flight Center
 
The Image:
 
GIF of above simulation, no labels.
 
Credit: John ZuHone/Harvard-Smithsonian Center for Astrophysics.
 
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