T.O.Pのインスタグラム(choi_seung_hyun_tttop) - 5月22日 11時08分

Supermassive Black Hole Expels Star From The Milky Way At Record Speed 🤯⚡️(artistic impression)

A star larger than the Sun has been seen escaping the Milky Way galaxy at a record-breaking 6 million kilometers per hour (3.6 million mph). Besides its sheer speed, the discovery is historic as the first time astrophysicists can confidently attribute the trajectory of a star to a close encounter with the black hole at the heart of our galaxy.

In celestial dynamics, it's dangerous for a larger, more powerful third party to get too close. When two stars orbiting each other encounter a third, one risks being expelled from the pair. If the intruder on such "domestic bliss" is a supermassive black hole, the expulsion can be astoundingly forceful.

That's the story of S5-HVS1 - a star recently identified to be moving at 1,755 kilometers (1,090 miles) per second away from the heart of the galaxy. If being flung into the vastness of intergalactic space sounds like a grim fate, it's nothing to that of its former partner. The companion star may have been consumed by now, or it may still be in orbit around Sagittarius A* - the Milky Way's supermassive black hole - but on an inevitable path to being destroyed.

Image credit: Eso.org @astronomy.ins

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