LavaCon 2025

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I spoke at the LavaCon this week. My presentation was very well received. There were well over 100 folks who chose to attend my presentation. Afterwards we had a supplier meeting in Cartersville and a hike up Pine Mountain. https://www.lavacon.org/ It was good to enjoy some brief moments with a llama as part of the conference. And it was good to meet up with lots of folks I have got to know over the years.
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In the following picture you will see a very interesting phenomena. The plane is above the clouds with the sun behind. You can see a shadow of the plane, but the more significant thing is the perihelia around the shadow. It was the day for that image. I had several opportunities for pics and I took a little film as well. You can see two distinct rings in the pic. The plane has a relatively sharp edge and the diffraction caused by the plane produces a nice series of rainbows projected on the clouds, I think. Very nice.

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Todd Sheehan said…
We call this a Halo in Hang Gliding. Every once in a while we'll get above the clouds (probably because we were towed there). I've seen my Halo once when I was in Florida... then we flew right through it!
7:57 AM
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