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| This ellipse shows a region of sky where a galaxy made of dark matter is thought to exist. |
Astronomers may finally have detected a signal of dark matter, the mysterious and elusive stuff thought to make up most of the material universe.
While poring over data collected by the European Space Agency's XMM-Newton spacecraft, a team of researchers spotted an odd spike in X-ray emissions coming from two different celestial objects — the Andromeda galaxy and the Perseus galaxy cluster.
The signal corresponds to no known particle or atom and thus may have been produced by dark matter, researchers said.
Space.com: Cosmic Mystery Solved? Possible Dark Matter Signal Spotted, Mike Wall Eureka Alert: Researchers detect possible signal from dark matter
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