Screaming Skull Galactic Cluster

This might look sort of like a screaming skull but it’s actually an x-ray image from the orbiting Chandra Observatory of the Perseus Cluster, a cluster of galaxies in the constellation Perseus that is 320 million light-years away and comprised of thousands of galaxies.

You can’t see any of the galaxies in this image, just a fifty million degree cloud of intracluster gas, which is more massive than all the galaxies combined.

X-ray image of The Perseus Cluster that looks like a screaming skull
via APOD

Happy Halloween!

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