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NASA X-ray mission exposes the Milky Way black hole’s violent history
The supermassive black hole at the center of the Milky Way has long looked quiet, a dim and seemingly dormant presence ...
Matvei Michkov was back on the ice Tuesday for the Flyers’ morning skate at Xfinity Mobile Arena. Head coach Rick Tocchet ...
Astronomers have obtained the sharpest-ever X-ray spectrum of an iconic active galaxy, providing the most accurate, precise ...
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