Flash Physics is our daily pick of the latest need-to-know developments from the global physics community selected by Physics World‘s team of editors and reporters
Close call: artist's impression of X9. (Courtesy: X-ray: NASA / CXC / University of Alberta /A Bahramian et al. Illustration: NASA / CXC / M Weiss)
Star in tight orbit around black hole
Astronomers have spotted what they think is a star in the clos
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