An Etymological Dictionary of Astronomy and Astrophysics

English-French-Persian

فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک



Mach disk
  گرده‌ی ِ ماخ، دیسک ِ ~  
gerde-ye Mach, disk-e ~
Fr.: disque de Mach  

Same as → shock diamond.

See also: So named because Ernst Mach (1838-1916) was the first to record its existence.