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High-energy-gamma-ray astronomy

former gamma-ray telescope

Pronunciation
/haɪ - ˈɛnərʤi - ˈɡæmə - reɪ əˈstrɑnəmi/
/hʌɪ - ˈɛnəʤi - ˈɡamə - reɪ əˈstrɒnəmi/