NuSTAR
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![Blurring of an X-ray source (corona) near a Black hole.Black hole with corona, an X-ray source (artist's concept).[26]Blurring of X-rays near Black hole (NuSTAR; 12 August 2014).[26]Credit: NASA/JPL-CalTech](/uploads/202501/30/Black_Holes_-_Monsters_in_Space1058.jpg)

NuSTAR (Nuclear Spectroscopic Telescope Array) is a space-based X-ray telescope that uses a conical approximation to a Wolter telescope to focus high energy X-rays from astrophysical sources, especially for nuclear spectroscopy, and operates in the range of 3 to 79 keV. It is the eleventh mission of the NASA Small Explorer satellite program (SMEX-11) and the first space-based direct-imaging X-ray telescope at energies beyond those of the Chandra X-ray Observatory and XMM-Newton. It was successfully launched on 13 June 2012, having previously been delayed from 21 March due to software issues with the launch vehicle.