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iss072e371351 (Dec. 17, 2024) --- The NICER (Neutron star Interior Composition Explorer) X-ray telescope is pictured installed on the starboard side of the International Space Station's integrated truss segment. NICER's 56 X-ray concentrators are covered by thermal shields, or filters, that block ultraviolet, infrared, and visible light while allowing X-rays to pass through to the mirrors underneath enabling the observation of neutron stars. Several thermal shields have been damaged allowing unwanted sunlight to "leak" into the astrophysics instrument interfering with X-ray measurements. NASA …
