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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><b>From:</b> extropy-chat <extropy-chat-bounces@lists.extropy.org> <b>On Behalf Of </b>Dylan Distasio via extropy-chat<br><b>Subject:</b> [ExI] Frame dragging across the universe...<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><div><div><p class=MsoNormal>Astronomers Have Caught a Star Literally Dragging Space-Time Around With It<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>>….<o:p></o:p></p></div><div><p class=MsoNormal>In everyday life, frame-dragging is both undetectable and inconsequential, as the effect is so ridiculously tiny. Detecting the frame-dragging caused by the entire Earth's spin requires satellites such as the US<span class=money>$750</span> million Gravity Probe B, and the detection of angular changes in gyroscopes equivalent to just one degree every 100,000 years or so.<o:p></o:p></p></div><div><p class=MsoNormal>…<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal><a href="https://www.sciencealert.com/scientists-caught-a-star-in-the-act-of-warping-the-fabric-of-space-and-time">https://www.sciencealert.com/scientists-caught-a-star-in-the-act-of-warping-the-fabric-of-space-and-time</a><o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I was one of the very lucky ones: I was given a chance to work on Gravity Probe B back in about 1989 and 1990. That was the coolest project in history, but I sheepishly confess my own skepticism: I never thought it would work. I estimated the chances all that stuff would work at about 20%. Well, it worked.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I was on that project during the earthquake on 17 October 1989. I was relieved to learn that the gyros were not damaged.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>spike<o:p></o:p></p></div></div></div></body></html>