NASA is about to launch a new spacecraft to look at the universe in X-ray light. The Imaging X-Ray Polarimetry Explorer, IXPE, will look at extreme objects such as black holes, neutron stars, and supernovae, asking fundamental questions about how high-energy light gets produced. The mission’s principal investigator, Martin Weisskopf, based at NASA’s Marshall Space Flight Center, has been studying these objects for more than 40 years with other telescopes including the Chandra X-Ray Observatory. He discusses some of the fascinating objects Chandra has looked at, and what IXPE may soon reveal about them.

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