<div dir="ltr"><div dir="ltr"><div class="gmail_default" style="font-family:arial,helvetica,sans-serif"><span style="font-family:Arial,Helvetica,sans-serif">On Wed, Apr 10, 2019 at 11:00 PM Stuart LaForge <<a href="mailto:avant@sollegro.com">avant@sollegro.com</a>> wrote:</span><br></div></div><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"></blockquote><br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><i>
<span class="gmail_default" style="font-family:arial,helvetica,sans-serif">> </span>As John pointed out their angular widths should be about almost equal <br>
at 5:4 for SgrA* vs M-87*. While there is a lot of dust between us and <br>
SgrA*, that shouldn't affect meters-wide radiowaves.</i></blockquote><div><i><br></i></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif"><font size="4">Meter-wide waves couldn't give you the resolution required even with a telescope the size of the Earth, they used millimeter and sub-millimeter microwaves.</font></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif"><font size="4"><br></font></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif"><font size="4">John K Clark</font></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif"> </div><div><br></div><div><br></div><div><br></div><div> </div><div><br></div><div> </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
The radio jet pointing directly at us would make the picture of SgrA* <br>
just look like a bright blotch of light with no dark "shadow" apparent <br>
so it would not look much like a "black" hole. Even in the picture <br>
M-87* they have, the shadow is not quite as dark as the peripheral <br>
space suggesting there is some radio emission occurring between it and <br>
us.<br>
<br>
And also, I know they billed it as a mere "picture" but would it have <br>
killed them to put in some form of scale or the galactic plane of M-87 <br>
or something for reference? The shadow of the BH looks like an ellipse <br>
elongated in the NE to SW direction. That could be the equatorial <br>
plane of the black hole's rotation in which case it would be spinning <br>
pretty fast. But with no frame of reference it might as well be a <br>
photo of a UFO.<br>
<br>
Stuart LaForge<br>
<br>
<br>
<br>
<br>
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