German–Russian X-ray telescope takes off to study the dark universe
17 Jul 2019
Eye in the sky: the Spectrum-Roentgen-Gamma mission will study the X-ray sky between 0.2 and 30 keV. (Courtesy: P Friedrich/MPE)
A long-awaited German–Russian telescope to survey the X-ray sky in unprecedented detail was succes
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Peter Gwynne is Physics World's North America correspondent