NASA’s Neutron star Interior Composition Explorer (NICER), at center, is an X-ray telescope aboard the International Space Station. Credit: NASA Matter in the hearts of…
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The Crab Nebula, the six-light-year-wide expanding cloud of debris from a supernova explosion, hosts a neutron star spinning 30 times a second that is among…
An image of NICER on the exterior of the space station with one of the station’s solar panels in the background. Credit: NASA For centuries,…