Scientists from Washington University in St. Louis are preparing to launch a balloon-borne telescope to unlock the secrets of astrophysical black holes and neutron stars. The telescope known as XL-Calibur could be launched from Esrange Space Center in Sweden as early as Wednesday, May 29.
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X-ray telescopes observe the most extreme and hottest objects in the universe. Physicists in Arts & Sciences at Washington University in St. Louis are playing key roles in the first dedicated X-ray polarimetry missions, including one that launched this month.