Astronauts Repair Black Hole Observatory, Inspect Cosmic Ray Detector On ISS Spacewalk.
An X-ray observatory used to study neutron stars is “back in the black” and a cosmic ray detector is ready for possible future upgrades after two astronauts completed a spacewalk outside the International Space Station (ISS). Nick Hague worked to repair the Neutron star Interior Composition Explorer, or NICER, mounted to the outside of the …
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