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<p class="MsoNormal" style="margin:0in 0in 0.0001pt;font-size:10pt;font-family:"Calibri","sans-serif""><b><span style="font-size:14pt;font-family:"Times New Roman","serif"">Apr 14,
2021<span></span></span></b></p>
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<p class="MsoNormal" style="margin:0in 0in 0.0001pt;font-size:10pt;font-family:"Calibri","sans-serif""><b><span style="font-size:14pt;font-family:"Times New Roman","serif"">The
Apollo Mission</span></b><span style="font-size:14pt;font-family:"Times New Roman","serif""> Presented by Fred Martin, ScD.; Dr. Martin
served as the Apollo Software Project Manager while at the MIT
Instrumentation Laboratory (now Draper Lab) and then pursued an industrial
career in software analysis and management. <br>
<i>History will surely record the voyage to the moon as being the greatest
adventure of the 20th century. We will first examine our fascination with our
closest neighbor and early speculation of travel through the writings of
Jules Verne. We will discuss the principles of how a rocket works, gain an
understanding of JFK’s decision and confidence to place a man on the Moon,
and experience the Apollo Moon Project “first hand:” its methods, triumphs
and surprises. Our resources will include Dr. Martin’s experiences within the
Apollo Program and videos of the exciting minute-by-minute landing on the
Moon’s surface.</i><span></span></span></p>
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<p class="MsoNormal" style="margin:0in 0in 0.0001pt;font-size:10pt;font-family:"Calibri","sans-serif""><b><i><span style="font-size:12pt;font-family:"Times New Roman","serif";color:black">SPECIAL NOTE - </span></i></b><i><span style="font-size:12pt;font-family:"Times New Roman","serif";color:black">Links to many of our previous sessions are
available online at <a href="http://lctg.toku.us/" style="color:blue;text-decoration:underline" target="_blank"><span style="color:blue">http://lctg.toku.us/</span></a>, thanks to the diligence of
Steve Isenberg. This includes the Mars Landing presentation of February 24.<span></span></span></i></p>
<p class="MsoNormal" style="margin:0in 0in 0.0001pt;font-size:10pt;font-family:"Calibri","sans-serif""><span style="font-size:12pt;font-family:"Times New Roman","serif""><span> </span></span></p>
<p class="MsoNormal" style="margin:0in 0in 0.0001pt;font-size:10pt;font-family:"Calibri","sans-serif""><span style="font-size:13.5pt;font-family:"Times New Roman","serif";color:black">We, the Lexington
Computer and Technology Group, meet at the usual 10AM Wednesday time, BUT
ONLINE, using the Zoom Video Conferencing Application, facilitated by Steve
Isenberg. </span><span style="font-size:12pt;font-family:"Times New Roman","serif""><span></span></span></p>
<p class="MsoNormal" style="margin:0in 0in 0.0001pt;font-size:10pt;font-family:"Calibri","sans-serif""><span style="font-size:13.5pt;font-family:"Times New Roman","serif";color:black">There is an instruction
page at <a href="https://toku.us/zoomish" style="color:blue;text-decoration:underline" target="_blank"><span style="color:blue">https://toku.us/zoomish</span></a> but note that the URL and
phone number shown are examples.</span><span style="font-size:12pt;font-family:"Times New Roman","serif""><span></span></span></p>
<p class="MsoNormal" style="margin:0in 0in 0.0001pt;font-size:10pt;font-family:"Calibri","sans-serif""><span style="font-size:12pt;font-family:"Times New Roman","serif""><span> </span></span></p>
<p class="MsoNormal" style="margin:0in 0in 0.0001pt;font-size:10pt;font-family:"Calibri","sans-serif""><span style="font-size:13.5pt;font-family:"Times New Roman","serif";color:black">Sometime after 9:45AM on
Wednesday, choose one of the following options:</span><span style="font-size:12pt;font-family:"Times New Roman","serif""><span></span></span></p>
<ul style="margin-bottom:0in" type="disc"><li class="MsoNormal" style="margin:0in 0in 0.0001pt;font-size:10pt;font-family:"Calibri","sans-serif""><span style="font-size:13.5pt;font-family:"Times New Roman","serif";color:black">If you have the Zoom application installed, start it and join
meeting with ID 972 6146 0830</span><span style="font-size:12pt;font-family:"Times New Roman","serif""><span></span></span></li><li class="MsoNormal" style="margin:0in 0in 0.0001pt;font-size:10pt;font-family:"Calibri","sans-serif""><span style="font-size:13.5pt;font-family:"Times New Roman","serif";color:black">From your browser, go to: <a href="https://zoom.us/j/97261460830" style="color:blue;text-decoration:underline" target="_blank"><span style="color:blue">https://zoom.us/j/97261460830</span></a></span><span style="font-size:12pt;font-family:"Times New Roman","serif""><span></span></span></li><li class="MsoNormal" style="margin:0in 0in 0.0001pt;font-size:10pt;font-family:"Calibri","sans-serif""><span style="font-size:13.5pt;font-family:"Times New Roman","serif";color:black">From your smartphone, tap this: +16468769923,,97261460830</span><span style="font-size:12pt;font-family:"Times New Roman","serif""><span></span></span></li><li class="MsoNormal" style="margin:0in 0in 0.0001pt;font-size:10pt;font-family:"Calibri","sans-serif""><span style="font-size:13.5pt;font-family:"Times New Roman","serif";color:black">From a “dumb” telephone, call 1 646 876 9923 and enter
meeting ID: 972 6146 0830 </span><span style="font-size:12pt;font-family:"Times New Roman","serif""><span></span></span></li></ul>
<p class="MsoNormal" style="margin:0in 0in 0.0001pt;font-size:10pt;font-family:"Calibri","sans-serif""><span style="font-size:13.5pt;font-family:"Times New Roman","serif";color:black">Once the connection is
established, you may need to locate and use the on-screen controls that turn on
the sound and the video. You should be able to see and hear others and they
should be able to see and hear you, if you have a camera and microphone (each
of which you can unmute selectively).</span><span style="font-size:12pt;font-family:"Times New Roman","serif""><span></span></span></p>
<p class="MsoNormal" style="margin:0in 0in 0.0001pt;font-size:10pt;font-family:"Calibri","sans-serif""><span style="font-size:12pt;font-family:"Times New Roman","serif""><span> </span></span></p>
<p class="MsoNormal" style="margin:0in 0in 0.0001pt;font-size:10pt;font-family:"Calibri","sans-serif""><span style="font-size:12pt;font-family:"Trebuchet MS","sans-serif";color:rgb(11,83,148)">If this email wasn't addressed to you and you
would like to join the group, or if you have a friend or colleague who might
also be interested in joining, it's easy. Ask them to go to the group's
wiki page at </span><span style="font-size:12pt;font-family:"Times New Roman","serif""><a href="http://LCTG.toku.us" style="color:blue;text-decoration:underline" target="_blank"><span style="font-family:"Courier New";color:blue">http://LCTG.toku.us</span></a></span><span style="font-size:12pt;font-family:"Courier New";color:rgb(11,83,148)"> </span><span style="font-size:12pt;font-family:"Trebuchet MS","sans-serif";color:rgb(11,83,148)">and follow the simple
instructions under "Join the Email List". By being a member of
the group you'll get reminders of upcoming meetings and infrequent related
messages. No advertising. The list is tightly managed.</span><span style="font-size:12pt;font-family:"Times New Roman","serif""><span></span></span></p>
<p class="MsoNormal" style="margin:0in 0in 0.0001pt;font-size:10pt;font-family:"Calibri","sans-serif""><span style="font-size:12pt;font-family:"Trebuchet MS","sans-serif";color:rgb(11,83,148)">Membership is free and given that all meetings
are using Zoom you only need to be connected to the Internet to join.
It's ok to join from anywhere you can get a decent Internet connection, even if
you're in orbit around Earth or on another planet or a moon (if you're connecting
from somewhere not on Earth, we'd like to chat).</span><span style="font-size:12pt;font-family:"Times New Roman","serif""><span></span></span></p>
<p class="MsoNormal" style="margin:0in 0in 0.0001pt;font-size:10pt;font-family:"Calibri","sans-serif""><b><i><span style="font-size:18pt;font-family:"Times New Roman","serif";color:black">Below are our plans for Upcoming Meetings. For
more schedule information, please refer to <a href="https://wiki.toku.us/doku.php?id=lctg_speaker_schedule" style="color:blue;text-decoration:underline" target="_blank"><span style="color:blue">https://wiki.toku.us/doku.php?id=lctg_speaker_schedule</span></a>
We will continue to have an online presentation (almost) every Wednesday until
it is prudent for us to resume meeting in person.<span></span></span></i></b></p>
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<p class="MsoNormal" style="margin:0in 0in 0.0001pt;font-size:10pt;font-family:"Calibri","sans-serif""><b><span style="font-size:14pt;font-family:"Times New Roman","serif"">Apr 21,
2021<span></span></span></b></p>
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<p class="MsoNormal" style="margin:0in 0in 0.0001pt 0.5in;font-size:10pt;font-family:"Calibri","sans-serif""><span style="font-size:14pt;font-family:Symbol"><span>·<span style="font:7pt "Times New Roman"">
</span></span></span><b><span style="font-size:14pt;font-family:"Times New Roman","serif"">Black Holes</span></b><span style="font-size:14pt;font-family:"Times New Roman","serif""> by Andrea Ghez (2020
Nobel Prize winner in Physics). <a href="https://www.youtube.com/watch?v=YcPPGVigvZk" title="https://www.youtube.com/watch?v=YcPPGVigvZk" style="color:blue;text-decoration:underline" target="_blank"><span style="color:windowtext;text-decoration:none">https://www.youtube.com/watch?v=YcPPGVigvZk</span></a>
(50min) Given at the World Science Festival<span></span></span></p>
<p class="MsoNormal" style="margin:0in 0in 0.0001pt 0.5in;font-size:10pt;font-family:"Calibri","sans-serif""><span style="font-size:14pt;font-family:Symbol"><span>·<span style="font:7pt "Times New Roman"">
</span></span></span><b><span style="font-size:14pt;font-family:"Times New Roman","serif"">Vortex Rings Colliding</span></b><span style="font-size:14pt;font-family:"Times New Roman","serif""> 3-year
effort to video two vortex rings colliding in super slow motion. <a href="https://www.youtube.com/watch?v=EVbdbVhzcM4" title="https://www.youtube.com/watch?v=EVbdbVhzcM4" style="color:blue;text-decoration:underline" target="_blank"><span style="color:windowtext;text-decoration:none">https://www.youtube.com/watch?v=EVbdbVhzcM4</span></a>
(8min) <span></span></span></p>
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</span></span></span><b><span style="font-size:14pt;font-family:"Times New Roman","serif"">Potpourri<span></span></span></b></p>
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<p class="MsoNormal" style="margin:0in 0in 0.0001pt;font-size:10pt;font-family:"Calibri","sans-serif""><b><span style="font-size:14pt;font-family:"Times New Roman","serif"">Apr 28,
2021<span></span></span></b></p>
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<p class="MsoNormal" style="margin:0in 0in 0.0001pt;font-size:10pt;font-family:"Calibri","sans-serif""><b><span style="font-size:14pt;font-family:"Times New Roman","serif"">Composition
of Stars</span></b><span style="font-size:14pt;font-family:"Times New Roman","serif""> Cacelia Payne-Gaposhkin would have received a
Nobel prize for figuring out what stars are made of, in a fairer world. <a href="https://youtu.be/BiNAAbRqFYQ" title="https://youtu.be/BiNAAbRqFYQ" style="color:blue;text-decoration:underline" target="_blank"><span style="color:windowtext;text-decoration:none">https://youtu.be/BiNAAbRqFYQ</span></a>
(John Rudy) </span><i><span style="font-size:14pt;font-family:"Times New Roman","serif"">from wikipedia: </span><span style="font-size:14pt;font-family:"Times New Roman","serif"">a British-born American
astronomer and astrophysicist who proposed in her 1925 doctoral thesis that
stars were composed primarily of hydrogen and helium. Her groundbreaking
conclusion was initially rejected because it contradicted the scientific
wisdom of the time, which held that there were no significant elemental
differences between the Sun and Earth. Independent observations eventually
proved she was correct. <span>(1h4m)</span></span></i><span style="font-size:12pt;font-family:"Times New Roman","serif""><span></span></span></p></td></tr></tbody></table>
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