<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 Mon, Feb 18, 2019 at 9:46 AM William Flynn Wallace <<a href="mailto:foozler83@gmail.com">foozler83@gmail.com</a>> wrote:</span><br></div></div><div class="gmail_quote"><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"><div style="font-family:"comic sans ms",sans-serif;font-size:small;color:rgb(0,0,0)"><span class="gmail_default" style="font-family:arial,helvetica,sans-serif">> </span>Do these detections have anything to do with a theory? </div></div></blockquote><div><br></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif"><font size="4">1) LIGO has given us by far the best experimental evidence that Einstein's General Relativity is correct.</font></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif"><br></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif"><font size="4">2) It tells us that 20 to 80 solar mass Black Holes are far more common than had been previously thought and nobody is quite sure how they formed.</font></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif"><br></div><font size="4">3) We now know that the very heaviest elements like Gold Mercury Thorium and Uranium were formed by the collision of 2 Neutron Stars. Just a few months ago massive amounts of these elements were found in the debris from a Neutron Star Collision detected by both gravitational wave and optical (and radio) astronomers.</font><div class="gmail_default" style="font-family:arial,helvetica,sans-serif"><br></div><font size="4">4) Optical and Gravitational Wave astronomy are complementary, with LIGO it's easy to tell the distance to a gravitational wave source but hard to tell its position in the sky, with conventional telescopes it's easy to tell the position in the sky of a optical source but hard to tell its <span class="gmail_default" style="font-family:arial,helvetica,sans-serif">distance</span>. Neutron Star-Black Hole mergers and 2 Neutron Stars colliding produce both a optical and a gravitational signal, and after we've found about a dozen of those we should be able to determine the ultimate fate of the universe and give us a hint in solving the greatest mystery in physics, Dark Energy. By determining the distance to these Neutron Star events much more accurately than ever before it will let us figure out if the acceleration of the universe is itself accelerating and thus if we're heading for the Big Rip. You asked what all this is good for and I suppose it would be good to know what things will be like in the far future.</font><br></div><div class="gmail_quote"><br><div class="gmail_default" style="font-family:arial,helvetica,sans-serif"><a href="https://en.wikipedia.org/wiki/Big_Rip">The Big Rip</a><br></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif"><br></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"><br></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif"><br></div><br>
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