International Celestial Reference System

celestial reference system using reference celestial sources observed at radio wavelengths

en-US/ˌɪntɚˈnæʃənɑl səˈlɛst͡ʃəl ˈɹɛfɹəns ˈsɪstəm/
en-GB/ˌɪntəˈnæʃənəl sɪˈlɛstɪəl ˈɹɛfɹəns ˈsɪstəm/

Катэгорыі:

astronomical coordinate system