The star Zeta Ophiuchi offers new clues about its violent past

Zeta Ophiuchi is on the go.

The star, which is 20 times more massive than our sun and located some 440 light-years from Earth, is zipping through the galaxy at about 100,000 mph (162,000 kph). That’s rather unusual for stars, which typically circle the center of their galaxy in a rather calm, organized manner. A new study has uncovered evidence supporting the leading theory as to why Zeta Ophiuchi has gone rogue, wandering across the Milky Way.

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