[pianotech] That's a long piano string

[Susan Kline]

Untunable, and not exactly on B flat, I bet. These black holes can be so 
slipshod ...

Noah Frere wrote:
> "Repeated outbursts in the form of powerful jets from the black hole 
> in the center of Perseus created giant cavities and produced sound 
> waves with an incredibly deep B-flat note 57 octaves below middle C, 
> which, in turn, keeps the gas hot." 
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