NASA is planning to repair NICER (Neutron star Interior Composition Explorer), an X-ray telescope on the International Space Station, during a spacewalk later this year. It will be the fourth science observatory in orbit serviced by astronauts. In May 2023, scientists discovered that NICER had developed a “light leak.” Unwanted sunlight was entering the instrument […]
Sounds like the parts for the repair will launch on the Cygnus for NG-21, which will fly on a Falcon instead of Antares since the new Antares 300 isn’t ready yet.