An Etymological Dictionary of Astronomy and Astrophysics

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Mach disk

گرده‌ی ِ ماخ، دیسک ِ ~

gerde-ye Mach, disk-e ~

Fr.: disque de Mach

Same as → shock diamond.

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

An Etymological Dictionary of Astronomy and Astrophysics
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