[Lex Computer & Tech Group/LCTG] Meeting Reminder: Einstein Rings, presented by Paul L. Schechter. 10AM ET, January 25, 2023. Lexington Computer and Technology Group

[Jonathan Goode]

 (NOTE: Initial Reminder.)



This meeting will be available in the Lexington Community Center. You may
attend in person (our usual room 237) or via Zoom.



Our Zoom Meeting ID is 972 6146 0830. Detailed instructions for joining us
on Zoom are at the end of this message.



*January 25, 2023*
Einstein Rings: *Gravitational lensing occurs when enormous masses like
giant black holes or clusters of galaxies warp and deflect light coming
from behind them. “Point” sources appear as arcs. When the source and
deflector are properly aligned, the arc can be a closed circle – an
Einstein Ring. The Sun's deflection of starlight is a small scale
example of what becomes large scale when clusters of galaxies are the
deflecting matter.* Presented by Paul L. Schechter, an MIT emeritus
professor of astrophysics.

*Below are our plans for Upcoming Meetings. For more schedule information,
please refer to https://wiki.toku.us/doku.php?id=lctg_speaker_schedule
<https://wiki.toku.us/doku.php?id=lctg_speaker_schedule> *

*February 1, 2023*
Potpourri
Crypto Crashes and Crypto Culture (Bob Primak) and Harry? (SNL video?)

*February 8, 2023*
Space Update, presented by George Gamota. *James Webb results could affect
this presentation.* *SPECIAL NOTE  -* *Links to many of our previous
sessions are available online at http://lctg.toku.us/
<http://lctg.toku.us/>, thanks to the diligence of Steve Isenberg. This
includes our sessions*

   - *Bitcoin, Web3 and NFTs https://youtu.be/QWOGF4PeEGY
   <https://youtu.be/QWOGF4PeEGY>*
   - *The Prodigy of High Precision Measurements*
*https://youtu.be/_2CXrNOB7HY
   <https://youtu.be/_2CXrNOB7HY>*
   - *Solar Panels and Energy Storage* *https://youtu.be/jh-ieBGwB4E
   <https://youtu.be/jh-ieBGwB4E>*
   - *Internet fast lanes, stock trading, net neutrality*
*https://youtu.be/qzm3QI-wyPg
   <https://youtu.be/qzm3QI-wyPg>*
   - *Scientific CCD Development at MIT Lincoln Laboratory*
*https://youtu.be/yisqIghJptg
   <https://youtu.be/yisqIghJptg>*
   - *Basics of Fusion https://www.youtube.com/watch?v=kgn7JYERNN4
   <https://www.youtube.com/watch?v=kgn7JYERNN4>*
   - *Fusion Part II  https://www.youtube.com/watch? v=akmg2mQ5Gik
   <https://www.youtube.com/watch?v=kgn7JYERNN4>*
   - *Notetaking software https://www.youtube.com/watch?v=yLAQKl7Kw2M
   <https://www.youtube.com/watch?v=yLAQKl7Kw2M>*
   - *Quantum Basics, part III https://youtu.be/7l8vqoN4Na4
   <https://youtu.be/7l8vqoN4Na4>*
   - *Ukraine: The Real Truth https://youtu.be/SD2XdUhzTaQ
   <https://youtu.be/SD2XdUhzTaQ>*
   - *Weather Models https://youtu.be/liTvQbtNnA0
   <https://youtu.be/liTvQbtNnA0> *
   - *Windows 11 https://youtu.be/NhlDobQ9eGY
   <https://youtu.be/NhlDobQ9eGY>*
   - *Generating Oxygen on Mars https://youtu.be/56-xpi3hEvc
   <https://youtu.be/56-xpi3hEvc>*
   - *Facial Recognition **https://youtu.be/6eupcUxqggU
   <https://youtu.be/6eupcUxqggU>*
   - *Voyager Spacecraft Update, Lessons Learned **https://youtu.be/ox2wl0E_PH8
   <https://youtu.be/ox2wl0E_PH8>*
   - *Cognition, Affect, and Learning: The Role of Emotions in
Learning **https://youtu.be/sf2JL3zwrmg
   <https://youtu.be/sf2JL3zwrmg>*



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
http://LCTG.toku.us 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.

Membership is free and given that all meetings are available on 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.

   - We, the Lexington Computer and Technology Group, will meet Wednesday
   at the usual 10AM Eastern Time, in person at the Lexington Community Center
   and online, using the Zoom Video Conferencing Application, facilitated by
   Steve Isenberg.

There is an instruction page at https://toku.us/zoomish but note that the
URL and phone number shown are examples.



To join our online meeting, sometime after 9:45 AM on Wednesday, choose one
of the following options:

   - If you have the Zoom application installed, start it and join meeting
   with ID 972 6146 0830
   - From your browser, go to: https://zoom.us/j/97261460830
   - From your smartphone, tap this: +16468769923,,97261460830
   - From a “dumb” telephone, call 1 646 876 9923 and enter meeting ID: 972
   6146 0830


   - 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).
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