<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <meta content="text/html;charset=ISO-8859-1" http-equiv="Content-Type"> </head> <body bgcolor="#ffffff" text="#000000"> <big><big><big><big>Untunable, and not exactly on B flat, I bet. These black holes can be so slipshod ...</big></big></big></big> Noah Frere wrote: <blockquote cite="mid:CABKkihrvePpRm93ewavs+58LATHnMBMdOJJZNJAwPbQ8qvcMGg@mail.gmail.com" type="cite">"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." </blockquote> </body> </html>