<div dir="ltr">> 

<span style="font-size:large">the density of M87's Black Hole is about that of air.</span><div><span style="font-size:large"><br></span></div><div><span style="font-size:large">Which is incredibly cool. But if an interpretation of the Holographic Principle is true, then a black hole has no interior, just its event horizon, where all the mass resides.</span></div><div><span style="font-size:large"><br></span></div><div><span style="font-size:large">Or rather, its volume is </span><span style="font-family:arial,sans-serif"><font size="4">indistinguishable from its surface, the event horizon. </font></span></div><div><span style="font-family:arial,sans-serif"><font size="4"><br></font></span></div><div><font face="arial, sans-serif" size="4">All area, no volume, just a 2D quantum screen. I am not sure, that this would be any cooler. Thinner then air may still be cooler.</font></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Thu, Apr 11, 2019 at 2:11 PM John Clark <<a href="mailto:johnkclark@gmail.com">johnkclark@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div class="gmail_default" style="font-family:arial,helvetica,sans-serif"><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, Apr 10, 2019 at 11:17 PM Darin Sunley <<a href="mailto:dsunley@gmail.com" target="_blank">dsunley@gmail.com</a>> wrote:<br></div><div dir="ltr" class="gmail_attr"><br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr">Ask, and ye shall receive<span style="text-align:center"> : </span><div><span style="text-align:center"><br></span></div><div><a href="https://xkcd.com/2135/" target="_blank">https://xkcd.com/2135/</a>  </div></div></blockquote><div><br></div><div><span class="gmail_default" style="font-family:arial,helvetica,sans-serif"><font size="4">I</font></span><font size="4">t's interesting that because the density of a Black Hole is inversely proportional to the square of the mass<span class="gmail_default" style="font-family:arial,helvetica,sans-serif"> </span>the density of M87's Black Hole is about that of air. Well it is if you count the Event Horizon as being the boundary of the thing; Einstein says there is a point of infinite density at the center although Quantum Mechanics disagrees. <span class="gmail_default" style="font-family:arial,helvetica,sans-serif">Nobody knows who's right.</span><br><br>John K Clark</font></div><div><span class="gmail_default" style="font-family:arial,helvetica,sans-serif"><br></span></div><div><span class="gmail_default" style="font-family:arial,helvetica,sans-serif"></span><br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><span class="gmail_default" style="font-family:arial,helvetica,sans-serif"></span><br>
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