WASHINGTON: Researchers from the United States and China said Wednesday they have discovered the closest known "hypervelocity star" that is moving away from the center of the Milky Way at more than 1.6 million km per hour.

"The hypervelocity star can help us know our Milky Way better, ranging from the supermassive black hole at its heart to the halo of dark matter surrounding our galaxy," Zheng Zheng, lead author and assistant professor of physics and astronomy from the University of Utah, told Xinhua.

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